Why are developmental psychologists forced to rely so heavily on correlational data instead of using only controlled laboratory experiments to test their hypotheses?

What does this quotation say about how miranda’s confession was made?

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.

Explain why societies cannot make a choice above their production possibilities frontier and should not make a choice below it.