Certain Species of Squirrels and Acorn Woodpeckers Both Eat Acorns

Multiple Choice

Certain species of squirrels and acorn woodpeckers both eat acorns.In forests without squirrels,the density of acorn woodpeckers averages 100 per square kilometer,whereas in forests with squirrels,the density of acorn woodpeckers is roughly halved.This reduced density most probably results from

A) interference competition.
B) herbivory.
C) character displacement.
D) exploitative competition.