Reinforcement is used to behavior. A. discourage
B. encourage
C. extinguish
D. understand

Which training principle states that exercising a certain body part are practicing a particular skill primarily develops that part or skill

Which statement is true about common childhood infectious disease? a. children should always be given antibiotics to treat an infectious illness. b. frequency of infectious illnesses usually increases as children grow older. c. having a minor infectious illness weakens a child's immune system. d. infectious illnesses are usually mild and require no medication.

Which of the following identifies the main culprit for america’s increasing weight gain?