Q.

The most important trophic level in a terrestrial food chain is:

1 the one with the highest energy requirement per individual  
2 the one with the least energy requirement per individual  
3 the one with moderate energy requirement per individual  
4 not dependent on the energy requirement per individual, thus, all are equally important  

Ans.

(4)

In any food chain, all the trophic levels are of equal importance. They maintain ecological balance.