In this model food web the only feeding links are these: rabbits eat clover; foxes eat rabbits. Clover is the only food of the rabbits in this web, and no other organism eats clover. If all the clover is removed and nothing else in this web changes, what happens to the rabbit population?

Explanation

The rabbits depend entirely on clover in this stated web, so removing the clover removes their only energy source and their numbers fall. The choice about the foxes leaving fails too: even with fewer foxes hunting them, rabbits with nothing left to eat cannot grow in number, so the loss of food dominates. The choice about switching to another plant fails because this web contains no other plant.