Question

Source of energy in an ecosystem is

• A. sun
• B. ATP
• C. sugar made by plant
• D. green plant

Answer 1

Answer: (A)

sun

Answer 2

Green plants produce food by the process of photosynthesis with the help of $CO_{2}$, $HO_{2}$ and sunlight. The food supply energy to other trophic levels of ecosystem. Hence sun is the primary source of energy of an ecosystem. ATP is the ultimate source of energy for a living body.