Fact 1: Courtship is behavior that is intended to attract a mate. Fact 2: For example, female birds secrete estrogen in response to the courtship of their male mates. Given the two facts above, what do birds secrete to attract a mate?
Choose from:
I. Energy.
II. Energy
III. fur and fat
IV. seeds
V. oxygen
VI. pollen
VII. Estrogen
VIII. acetic acid
Answer:
VII.