What is the biggest single behavioral effect of age-related physical change in late adulthood?

Approximately how many hours per day do adolescents spend listening to music?

A) 9 B) 6 C) 3 D) 1.5

If your body could not produce leptin, what would be the probable outcome?

a. Diabetes b. Narcolepsy c. Obesity d. Phenylketonuria