Generally the food chain has how many trophic levels

Options

A. One
B. Two
C. Three or Four
D. Three

Answer

D

Explanation

In all ecosystems first base level of the pyramid will be occupied by producers, consumers occupy higher trophic level. Energy is lost when it is transferred from one trophic level to the next. Approximately `10%` of the stored energy of a trophic level could be transferred to the consumers of the next level. Thus very less number of individuals could be supported at the top level. In a four-level pyramid, only `0.1%` of fixed energy ultimately reaches the top.