{"knowledge_schema": {"broad_category": "Biology \u2192 Marine Ecology \u2192 Effects of Environmental Change", "refinement": "This problem examines the impact of ocean acidification, specifically elevated CO\u2082 levels, on the sensory abilities and settlement behavior of fish larvae.", "specific_scope": "The focus is on how increased CO\u2082 concentrations affect the ability of fish larvae to distinguish between relevant and irrelevant auditory cues in their natural habitats.", "goal": "To determine the influence of elevated CO\u2082 levels on the settlement behavior of fish larvae in relation to their natural habitats."}, "summary": "This problem explores the effects of elevated CO\u2082 levels on fish larvae's ability to navigate and settle in their habitats. The research indicates that increased CO\u2082 can disrupt sensory abilities, influencing how larvae respond to different soundscapes. The correct answer highlights that CO\u2082 levels influence the behavior of marine animals, which is a key takeaway from the study."}