Please. Need this for a test asap

What refers to the existence of more than one level of government in the country

According to erikson's theory, which stage of social development is related to adulthood

2. every fitness program should include a. a longer warm-up period than cool-down period. b. a warm-up, a primary conditioning period, and a cool-down. c. at least 60 minutes of cardio activity. d. at least 15 minutes of vigorous activity.