Afactor that can vary among people taking part in an experimental study is known as a

The word means the use of rules to control behavior

Practice or pre-exercise theories of play pose the idea that a. play provides children with an opportunity to practice adult activities. b. play is necessary to reenergize human cognition. c. children have too much energy and play will rid them of that energy. d. children are the link between animals and human beings.

Explain why you believe physician assisted suicide should or should not be legalized in more states across the us.