Which Reflects Positive Density-Dependent Population Regulation

Which reflects positive density-dependent population regulation?
I. Small populations of flowers produce fewer seeds per individual than large populations of flowers.
II. Large groups of birds are better able to detect and avoid predators than small groups of birds.
III. The probability that a squirrel will be killed by a forest predator does not depend on the size of the squirrel population.

A) I only
B) II only
C) III only
D) I and II
E) I and III

Correct Answer:

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