An example of a recreational drug that is found in nature is

Four-year-old Mark eagerly bit into a lemon wedge. In response to the lemon's sour taste, he said, "Yuck!" Mark never bit into another lemon wedge. Skinner would say that the lemon's taste functioned as a ________________ for Mark's lemon-eating behavior.

a. reflex b. reinforcement c. context d. punishment

Technically, a woman is considered to have reached menopause one year after her ______ cease

Fill in the blank with correct word