Justin borrowed a crayon from Jason. Both boys are coloring in separate coloring books. In what type of play are the boys engaging?

What is sexual arousal that occurs as a result of being made to suffer?

a. sexual sadism b. exhibitionism c. pedophilia d. sexual masochism

The principle of natural selection was first formulated in general terms by the British naturalist ________

a. Francis Crick. b. Gregor Mendel. c. James Watson. d. Charles Darwin.