Question

deep-sea anglerfish – bioluminescence produced by chemical reactions to attract prey.
behavioral adaptation
structural adaptation
physiological adaptation

Explanation:

Bioluminescence in anglerfish is a chemical reaction within their body (physiological process) to produce light for prey attraction. Physiological adaptations involve internal bodily functions/reactions, unlike behavioral (actions) or structural (physical features) adaptations. So the green box labeled "Physiological adaptation" is correct.

Answer:

The green box (labeled "Physiological adaptation")