Question

why do most food chains consist of four steps ????please post your answers fast

Answer 1

it happens because when the chain is passing energy is getting reduced in each turn. And every animal have its own energy requirements. Hence mostly there is four steps in food chains.

Answer 2

Most of the food chains consists of 4 steps because the energy transfer goes on decreases from step to step.So less energy is received to the top carnivore.