Natural Vegetation and Habitats

This is the correct answer as these are the most widespread forests of India and are also called the monsoon forests.

This is an incorrect statement. The trees in tropical evergreen forests reach up to the height of 60 metres or even above. Thus, this is the correct answer choice.

This is the correct answer as the Ganga Brahmaputra delta is also called Sundarbans as this delta has sundari trees.

This is the correct answer as at higher altitudes, mosses and lichens form part of tundra vegetation.

Coniferous forests (also called taiga or boreal forests) dominate Scandinavia due to their adaptation to cold northern climates. These evergreen forests, featuring trees like spruce, pine, and fir, are well-suited to survive harsh winters with snow and short growing seasons characteristic of the region.

Pampas (South America), Veld (southern Africa), and Savanna (tropical regions) are all grassland ecosystems. The Rocky Mountains is a major mountain range in North America, not a grassland. Mountains have different vegetation, elevation zones, and ecological characteristics compared to flat or rolling grassland terrain.

Equatorial rainforests have incredible biodiversity and all three hardwood species - mahogany, rosewood, and ebony - are found in these tropical forests. These are valuable tropical hardwoods that thrive in the warm, constantly wet conditions near the equator. Each species has adapted to the competitive, layered canopy structure of rainforest ecosystems.

In the Tundra region, the harsh climate (permafrost, short growing season) makes agriculture impossible. While all options describe tundra conditions, 'infertile dissected terrain' is the most direct explanation for why hunting and fishing become the primary livelihood - the land itself cannot support cultivation. Sparse population is a consequence, not a cause.

Playas are flat, dust-covered areas in deserts that form in the lowest points of interior drainage basins. They are ephemeral lakes that fill with water after rare rainfall and dry up to form hard-packed clay or salt surfaces. While sand dunes are iconic desert features, playas are actually more commonly encountered across desert landscapes as they form in any topographic low. Pediments and pediplains are also desert features but less common.

The tallest trees in the world are found in the temperate rainforest biome, specifically in the Pacific Northwest region of North America. Coastal redwoods (Sequoia sempervirens) can grow over 100 meters tall. The equatorial tropical rainforests have dense vegetation but shorter trees due to nutrient-poor soils, while other biomes don't support such height.

Low rainfall is the primary limiting factor for afforestation in deserts. While sterile soil, grazing animals, and high temperature can all hinder plant growth, adequate water availability is the fundamental requirement that deserts lack. Without sufficient precipitation, even hardy xerophytic plants cannot establish.

Only statement 1 is correct. Mahogany is indeed native to tropical equatorial forests. Statement 2 is wrong because cacti are desert/xerophytic plants adapted to arid conditions, not heavy precipitation. Statement 3 is wrong because fir trees are coniferous trees of temperate/boreal regions, not the tropical Amazon. Statement 4 is wrong because tea requires moderate humidity, not a dry climate.