For example, the size of the insect population effects the size of the frog population, which effects the size of one of their predators, the trout, which in turn effects their predators, the pike.
(the size of the insect population; effects; the size of the frog population, which effects the size of one of their predators, the trout,) (the size of the frog population; effects; the size of one of their predators) (the trout; effects; their predators)
the size of the insect population the size of the frog population the trout
effects effects effects
the size of the frog population, which effects the size of one of their predators, the trout,
the size of one of their predators
their predators