Which theorist placed an emphasis on recognizing and incorporating both "maleness" and "femaleness" into healthy human development (that is, the concept of androgyny)?

Taking an aspirin every time you get a headache is an example of negative reinforcement. In this scenario, _____ is the behavior that is being strengthened

Fill in the blank with correct word

Certain birds with the ability to thrive in a variety of climates become more likely to survive and reproduce than those who have a limited tolerance for heat or cold. This is an example of

a. mate selection. b. natural selection. c. sexual selection. d. evolutionary psychology.