How do I exercise because I need help with it

How is health different for most people in this country today from what it was for people born in 1900? a. people have a shorter life span. b. people today work harder to survive. c. people today live in poorer sanitary conditions. d. people today can focus less on day-to-day survival and more quality of life.

How could you find out if that advice is based in scientific evidence?

The statement defines the use of ethics.