A food chain is a model that represents how energy and matter are transferred through an ecosystem.

Question

Typically, a food chain has five or fewer links because
A.
the amount of energy available decreases with the addition of each link.
B.
there are only three categories of organism—producers, consumers, and decomposers.
C.
humans are the top predators and are always the fifth link.
D.
no organism exists that eats more than five types of food.

Answer 1

A. the amount of energy available decreases with the addition of each link.