Which terms describe the motion of most objects in our solar system

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of