The study of meaning in words and language is known as __________

Which theory of sleep suggests that we sleep as an evolutionary adaptation that helps shield us from predators and injury when it is dark outside?

a. The protection and preservation theory b. The body restoration theory c. The memory theory d. The growth theory

In the United States, what is the rate of single motherhood in White Americans?

a. over80% b. over60% c. over40% d. over20%