(1) A number of factors influence the pace at which people age. (2)First of all, genes—traits inherited from parents—play a major role in how people age. (3)Genes play a role in how much hair loss we have or how much weight we gain. (4)Genes also help explain why some people at 75 years old look 60, while others who are 60 appear to be 75. (5)A second factor that influences aging is a persons lifestyle. (6)Older-looking skin and wrinkles can be caused by too much sun exposure in youth—part of an outdoor, active lifestyle. (7)On the other hand, a person who does not exercise is more likely to look and feel older than one who is physically active. (8)Social forces are a third factor that influence aging. (9)Older people who feel isolated or lonely often age faster than those who don't report having those feelings. (10)But older people who are involved with others—their families, religious groups, or peer groups—age more slowly and live longer than those who don't.
1. The major supporting details of this paragraph are
a. factors that influence the pace at which people age.
b. traits people inherit from parents.
c. ways to age more slowly.