A species of worm is active at night, and comes to the top of the soil only when it is dark outside. In the daytime, the members of the species stay burrowed several inches beneath the soil. Which of these explanations BEST describes how this nocturnal
behavior evolved in the species of worm?
A)
The worms have a predator with keen night vision
B)
The worms have a predator that is active during the day.
The worms rely on solar energy to increase their body temperature,
D)
The worms have increased mating opportunities at the surface that require
visual cues