Question

Consider the following food chain:

Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat.

What happens to the other members of the food chain if the garden is removed?
a.
The number of snails and birds decrease.
b.
The number of snails increases, while the number of birds decreases.
c.
The number of snails decreases, while the number of birds increases.
d.
The number of snails and birds increase.

Answer 1

a. The number of snails and birds decrease.

Reason: Removing the garden removes the snails' food source, so snail numbers fall; with fewer snails available, bird food declines and bird numbers fall too.