[Campbell Biology P.1189] Which of the following statements about a specific animal behavior ... | Practice Question

Which of the following statements about a specific animal behavior primarily addresses its "ultimate causation"?

• A: Male peacocks fan their tails due to hormonal changes triggered by increased daylight, signaling reproductive readiness.
• B: Birds migrate south in winter because decreasing temperatures and food scarcity trigger an innate navigational program.
• C: A frog's tongue snaps out to catch a fly as a reflex arc in its nervous system detects the fly's movement.
• D: Stickleback males attack red objects because this aggression increases their chances of defending nesting territory and successfully reproducing.