Question

why are there less secondary consumers in an ecosystem than producers? (1 point) around 90% of energy from one trophic level to the next is available. there is less land to use for habitat after the producers grow. more tertiary consumers will eat secondary consumers over producers. there isnt enough energy available to support more secondary consumers.

Explanation:

This relates to the 10% energy transfer rule in ecosystems: only ~10% of energy moves from one trophic level to the next, so 90% is lost as heat/used for metabolism. This limits the energy available for higher trophic levels like secondary consumers, so their population is smaller than producers. The first option incorrectly states 90% is available (it's 10%), the second is irrelevant, and the third does not address the core energy limitation reason.

Answer:

There isn't enough energy available to support more secondary consumers.