During Recess,children Are Trying to Balance a Seesaw

Multiple Choice

During recess,children are trying to balance a seesaw.If one side is too heavy,a child will get off the heavy side;if one side is too light,a child will get on the light side.The children's
Behavior is similar to our biological states as they try to create

A) drive satisfaction.
B) equilibrium.
C) arousal.
D) a habit.