The form of research that identifies cause-and-effect relations is called a(n) __________

Secondary traits are changeable aspects of personality, such as musical preferences, habits, and casual opinions

Indicate whether this statement is true or false.

Which of the following individuals will generally need the most sleep in a day?

a. A 1-month old baby b. A 44-year old adult c. A college student d. A 10-year old child