Which of the following statements about the flow of energy in an ecosystem is correct?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Energy moves in one direction, from producers to consumers, and does not return.
The flow of energy is unidirectional: the energy captured by green plants does not go back to the Sun, and the energy passed to herbivores does not come back to the plants. Only about 10 per cent of it reaches each next level, so it decreases along the chain.