Question

Question 13
Which of the following limits the number of trophic levels in a food chain?

(a) Decrease in energy at higher trophic levels
(b) Sufficient food supply
(c) Polluted air
(d) Water

Answer 1

Option (a) is correct.
Energy decreases as it moves up the trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level.