A male stickleback will be aggressive toward other male sticklebacks that invade its territory.Of the following,which will tend to elicit the strongest aggressive response-

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Quizplus · Accepted Answer

Male sticklebacks are highly territorial and respond aggressively to the red belly coloration of other males during the breeding season. The red patch is a key trigger for this aggression, more so than shape or species differences.

A Male Stickleback Will Be Aggressive Toward Other Male Sticklebacks