Question

The existence of life on Earth is primarily due to

• A. the formation of fossil fuels on Earth.
• B. the energy from the Sun.
• C. the revolution of Earth around the Sun.
• D. the evolution of species.

Answer 1

Answer: (B)

the energy from the Sun.

Life on Earth is primarily driven by the energy from the Sun.

A small portion of the Sun's energy reaching the Earth is absorbed by green plants through the process of photosynthesis. This energy is converted into chemical energy and stored in plants. In this process, carbon dioxide and water are converted into carbohydrates. These carbohydrates are used as food by the living organisms. The human beings and animals eat this food to carry out their life activities thus converting the chemical energy into mechanical energy.