Energy is important for all living things. a squirrel's body changes chemical potential energy obtained by into heat and motion.

Food or calories because the squirrel would chemically change the food into body heat and motion (running up trees and finding more food)

Ifound this information on google “yes. they have a mouth and brain at one end and an anus at the opposite end. what characteristics distinguish an annelid from other worms? annelids have segmented bodies and a coelem which is a tube filled with fluid and contains most of the organs.“ i hope it you