Change in Physical Aging, Chapter 10

This assignment is in 2 parts:

Part 1:

Distinguish between primary aging, secondary aging and tertiary aging Why do we distinguish between these 3 types of aging?

Part 2:

Aging is a natural proces, however, the media doesn't really accept this aging process and therefore, we are innunadated with ads for aging more gracefully. The changes which we can actually modify include: appearance, body shape, skin changes (firming cream, for example), vision, hearing and balance. Priotize each change you could do something about and explain why you listed the way you did?