Passage Summary: Scientists found that male guppies with different amounts of orange on each side of their bodies usually show their more colorful side to females, who happen to prefer that color.

Conclusion: Male guppies adjust their courting behavior based on the reactions they receive from female guppies.

Reasoning: Females prefer the orange side of males, and males with asymmetrical coloring tend to present their more orange side during courtship.

Analysis: To strengthen this argument, we need to confirm that the male's behavior is a deliberate reaction to the female's presence or preference. Currently, the stimulus shows a correlation, but it doesn't explicitly prove that the male is 'altering' his pattern specifically because of the feedback. Look for an answer choice that shows the male changes his behavior specifically when he notices the female is paying attention or when he has the opportunity to choose which side to show. Eliminating the possibility that this is just a fixed, non-responsive instinct would also be a strong way to support the claim.