Shrews and insect-eating birds both eat the same prey in the food web shown above. The ecosystem experiences a shortage of grass, which impacts the population of grasshoppers. What will happen to the populations of shrews and insect-eating birds when the population of grasshoppers decline?
The population of insect-eating birds will increase due to an increase in food supply.
An increase in the food supply will cause the populations of shrews to increase.
The population of shrews will increase because they will eat rabbits and squirrels.
Shrews and insect-eating birds will compete for food causing one or both of the populations to decline.