Energy Resources and Storage

Renewable resources are those that are replenished naturally over relatively short periods of time. It includes solar energy, tidal energy, geothermal energy, biomass, etc. Thus the correct answer is option A.

Solar radiation, wind power, and sea tides are all renewable (inexhaustible) and considered non-conventional sources of energy.

Natural resources occur naturally within environments, that exist relatively undistributed by humanity, in a natural form. A natural resource is often characterized by amounts of biodiversity and geodiversity existent in various ecosystems. Natural resources are derived from the environment. Biotic resources are obtained from the biosphere (living and organic material), such as forests and animals, and the materials, that can be obtained from them. Forests and wildlife are both renewable in the short term but non renewable once a point has been reached or to a point. Forests can be managed to some degree sustainable forestry cuts older trees, while planting new one to replace them, this works in some types of environments better than others.

• Renewable energy sources are energy sources that are always being replenished. They can never be depleted. Some examples of renewable energy sources are solar energy, wind energy, hydropower, geothermal energy, biomass energy, ethanol, jatropha plant, and bagasse.
• Ethanol, derived from plant material, is a renewable energy source because the production and combustion of ethanol complete a cycle.
  
• The oil from Jatropha plants is mainly converted into biodiesel for use in diesel engines(biodiesel).
  
• Bagasse is the dry pulpy residue left after the extraction of juice from sugar cane. Bagasse is usually combusted in furnaces to produce steam for power generation. 
• Hence ethanol, jatropha plant and Bagasse are the renewable sources of energy.
• So, the correct answer is 'All the above'.

The biogas plant helps in the degradation of the organic waste to form gases like methane, carbon dioxide, hydrogen and some other gases in traces. The wastes from various different sources can be used for the production of biogas. The molasses are considered as the industrial wastes which can be degraded by the bacterial action. The cattle and animal dung is used in the biogas plant. The vegetable peels, fruit peel and other domestic wastes are used as the sources for the production of biogas. 

• The production of alternative sources of non-renewable (not capable of being replenished) sources is called as Eco-efficiency.
• The term eco-efficiency was coined by WBCSD(World Business Council for Sustainable Development) in its 1992 publication
  
• Eco-efficiency can be achieved by the use of alternative raw materials and recycling wastes.
  
• Hence the production of alternative sources of non-renewable sources is called as Eco-efficiency.
• So, the correct answer is 'Eco-efficiency'.

Solar cooker is a non conventional sources of energy. Increasing population would need more and more energy. New sources such as solar energy, nuclear energy are being used. Solar cooker uses solar energy. 

Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human time scale such as sunlight, wind, rain, tides, waves and geothermal heat. Hence, Sun is naturally coming and can be used in the form of solar energy, to evaporate water which turns into rain and rains are useful in many uses. Ultimately, Sun is the renewable source of energy.

Renewable- (b), (c) and (e); Non-renewable- (a), (d) and (f).
Here once petrol,diesel, coal and oil are consumed, for example in our vehicle, it cannot come back and renew to some other thing where as in wood, wind and water once we use it for some purpose we can use it for some other thing again like if wood is used in making bed then again we can make it back to wood or some other thing. Hence, these are renewable sources.

Unlike fossil fuels, trees are eternal sources of energy for animals. They absorb sunlight directly from the environment and keep on producing food for others as long as they exist.

Renewable-(b), (c) and (e); Non-renewable-(a), (d) and (f).
Here once petrol, diesel, coal and oil are consumed, for example in our vehicle, it cannot come back and renew to some other thing whereas in wood, wind and water once we use it for some purpose we can use it for some other thing again like if wood is used in making bed then again we can make it back to wood or some other thing. Hence, these are renewable sources.

Tidal energy is caused by the gravitational pull of the Moon and Sun on Earth's oceans, which is distinct from direct solar radiation, though it is often categorized as a renewable energy source.

The steam comes from reservoirs of hot water found a few miles or more below the earth's surface. The steam rotates a turbine that activates a generator, which produces electricity Hence Geothermal energy can be used to produce electricity.

Geothermal power plants are actually known for their ability to operate continuously (base load power), unlike solar or wind, making the claim that they cannot operate round the clock false.