The processes of ______ work to maintain body weight and normal body temperature

What is the biggest difference between the different stages of the sleep cycle?

A) Changes in physical activity B) Changes in respiratory effort C) Changes in muscle tone D) Changes in brain-wave activity

As an infant's short-term and long-term memory improve, he or she should also get better ____

a. with the creation of personal fables b. in their degree of egocentrism c. at the task of object permanence d. speaking to an imaginary audience