Development involves growth and changes in the body and brain

Physical development.

Explanation:

Development may be defined as the growth of the individual whether physically, psychologically or physiologically. The growth is important for the development of body parts and mentally growth as well.

Physical development starts in human at the stage of infancy and remain till late adolescents. This development involves the development of changes in the growth of body part and brain. The individual learn the ability of writing, learning and grasping.

Thus, the answer is physical development.

so i really think that most of the health care industry be doing more bad than good.

answer(b) keep oxygenated and deoxygenated blood separate;