Question

A depleting source of energy is
A. Wind
B. Sunlight
C. Water
D. Fossil fuels.

Answer 1

Hint: The functional resource of an organism is energy. Energy can be transferred from one form to another but it cannot be created or destroyed. Organisms need the energy to perform their biological functions for survival. The major source of energy is the sun. The plant uses sunlight to produce the nutrients by photosynthesis. Produced nutrients are taken by the other organisms.

Complete answer:
-The wind is a renewable energy source. It can restock over the human time scale. Wind energy is used to generate electric energy by using wind turbines. Wind-generated electricity is mainly used in milling.
-The sun is the major source of energy. It is also renewable energy. Plant converts the solar energy to the chemical energy which is then passed to the other consumer of the ecosystem. The plant is known as a primary producer as they are capable of making their food. From primary producer solar energy is then passed to the primary consumer to secondary consumer. Solar energy can be used to produce electricity by solar thermal power.
-Water is another source of renewable energy. Using turbine water can generate electric energy.
-Fossil fuel is the depleting source of energy. It can’t be restored over the human period. There are four types of fossil fuels found in nature. They are petroleum, natural gas, coal and Orimulsion.
So, the correct answer is “Option D”.

Note: The energy which is not replenished in human life span is called non renewable energy or depleting energy. Fossil fuel comprises mainly carbon. The formation of fossil fuels involves natural processes like dead buried organism decomposition. Decomposed organisms are converted into heavy oils, natural gas etc.