In Freudian theory the part of the psyche that is present at birth and houses biological drives, such as hunger, as well as two key psychological drives, sex and aggression, is known as the __________

Which theory of sleep suggests that we sleep to rest our bodies and minds and rejuvenate ourselves for the next day?

a) the place theory b) the circadian theory c) the evolutionary theory d) the restorative theory

For 2- to 4-year-old children who spend time in the hospital, the most frequent reaction is

a. anxiety. c. relief. b. joy. d. sadness.