World and Indian Geography

Mettur Dam is built across the Kaveri.

West of Aravallis is a high rainfall area.

Tamil Nadu receives the maximum rainfall due to northeast monsoon.

Kerala is the largest producer of natural rubber in India, accounting for the majority of the country's rubber production. The state's climate and geography are ideal for rubber plantations.

 The native (undomesticated) origin of coffee is thought to have been Ethiopia.

The Surma Valley (Barak Valley) in Assam is renowned for tea plantations due to its ideal climate - adequate rainfall, temperature, and well-drained acidic soil. Assam is India's largest tea-producing state, and the Surma Valley region hosts extensive tea gardens. Coffee, rubber, and cocoa are grown in different regions of India.

Bass Strait separates Tasmania (the island state) from mainland Australia. Named after explorer George Bass, it connects the Indian Ocean to the Tasman Sea. The other straits are in different regions: Sunda (Indonesia), Kanmon (Japan), and Tiran (Red Sea near Egypt).

The standard average salinity of seawater is 35 parts per thousand (ppt), often expressed as 35/1 or 35‰. This means 35 grams of salt per kilogram of seawater. The other values (27, 80, 42) don't match the established scientific standard for ocean salinity.

The Dead Sea is the saltiest sea in the world with salinity around 34% (more than 9 times ocean salinity). The Red Sea is salty (4%) but not the saltiest. Arabian Sea and Caribbean Sea have normal ocean salinity (3.5%). The Dead Sea's extreme salinity comes from high evaporation in an endorheic basin.

Mulching involves covering soil with organic material or plastic to conserve moisture, suppress weeds, and protect soil structure - it actually PREVENTS soil erosion rather than causing it. Excessive ploughing loosens topsoil making it vulnerable, overgrazing removes vegetation cover, and contour ploughing is a protective measure. Therefore, mulching is the action that does not cause soil erosion.

Nathu La is a high-altitude mountain pass located in Sikkim, connecting India with China's Tibet Autonomous Region. It's one of the oldest trading routes and was re-opened for trade in 2006. Meghalaya, Himachal Pradesh, and Jammu and Kashmir have other passes but not Nathu La.

Anamudi in Kerala is the highest peak in the Western Ghats at 2,695 meters (8,842 feet). It's located in the Anaimalai Hills of the Western Ghats range. Other options: Mullayangiri (1,930m) is Karnataka's highest peak but not the highest in entire Western Ghats, Salher (1,567m) is in Maharashtra, and Kemmanagundi (1,434m) is also in Karnataka - both are lower than Anamudi.

Neyveli in Tamil Nadu is famous for its lignite (brown coal) mines and thermal power station. It's one of India's largest lignite mining operations. Neyveli is not associated with crude oil, salt production, or iron ore mining - lignite is its signature resource.

The Java Trench (also known as the Sunda Trench) is the deepest part of the Indian Ocean, reaching approximately 7,725 meters (25,344 feet) depth. The Mariana Trench is in the Pacific Ocean, Diamantina Trench is in the Indian Ocean but shallower, and Puerto Rico Trench is in the Atlantic Ocean.

The Volga River is the longest river in Europe, flowing approximately 3,530 kilometers through western Russia to the Caspian Sea. The Danube is Europe's second-longest, while the Rhine and Ural are significantly shorter. The Volga is often called 'Mother Volga' in Russian culture.

Sambhar Lake, India's largest inland salt lake, is located in Rajasthan district near Jaipur. It's a major salt production site and ecologically important wetland. The spelling 'Rajastahn' in the option is a typo, but the location is correct. Gujarat, Madhya Pradesh, and Bihar do not contain this salt lake.

The Panama Canal is a man-made waterway that cuts across the Isthmus of Panama, connecting the Pacific Ocean to the Atlantic Ocean (via the Caribbean Sea). This shortcut saves ships from having to travel around the southern tip of South America, reducing journey times by thousands of miles. The canal is one of the most important artificial waterways in the world for international maritime trade.

The Cumbarjua Canal is an inland waterway located in Goa, India. It connects the Mandovi and Zuari rivers, serving as an important channel for transportation and fishing activities in the region. This canal is a significant geographical feature of Goa's estuarine system.

Lake Victoria is the largest lake in Africa by surface area, spanning approximately 68,800 square kilometers. It is located in East Africa, bordered by Tanzania, Uganda, and Kenya. Lake Victoria is also the source of the Nile River and supports millions of people through fishing and agriculture.

The Pacific Ocean is the largest and deepest ocean on Earth, covering approximately 46% of the Earth's water surface and about one-third of the total surface area. It is larger than all of Earth's landmasses combined and contains more than half of the world's free water.

The temperate grasslands of Australia are known as 'Downs', particularly referring to the areas in southeastern Australia. 'Veld' refers to South African grasslands, 'Prairie' to North American grasslands, and 'Savanna' to tropical grasslands with scattered trees.