Question

how does the 10% rule influence the distribution of energy in a food chain?
energy remains constant at all trophic levels.
energy increases at each trophic level.
energy decreases at each trophic level.

Explanation:

The 10% rule in a food - chain states that only about 10% of the energy from one trophic level is passed on to the next level. As a result, energy decreases at each trophic level. Energy is lost as heat and used for metabolic processes at each step.

Answer:

Energy decreases at each trophic level.