Question

which of the following is the most likely explanation for the change in population in 2009? a wolves, which prey on deer, were being hunted more than usual. b rainfall in the previous spring was higher than the yearly average. c humans introduced grazing animals that feed on the same plants as the deer. d more insects that pollinate flowering plants move into the habitat.

Explanation:

If wolves, the predators of deer, are hunted more than usual, the predation pressure on deer decreases. This would lead to an increase in the deer population as fewer are being killed by wolves. Rainfall in the previous spring being higher than average may affect plant - growth but not directly the deer population in the way predation does. Introduction of grazing animals that compete with deer for food would likely decrease the deer population. The movement of pollinating insects into the habitat has little direct impact on the deer population.

Answer:

A. Wolves, which prey on deer, were being hunted more than usual.