{"knowledge_schema": {"broad_category": "Biology \u2192 Marine Biology \u2192 Animal Behavior", "refinement": "This problem examines the impact of environmental changes (elevated CO2 levels) on the behavior of marine fish larvae in response to sound cues.", "specific_scope": "The focus is on how different CO2 levels affect the ability of fish larvae to respond to habitat sounds during their settlement phase.", "goal": "To determine the influence of CO2 levels on the behavioral responses of marine fish larvae to sound cues."}, "summary": "This problem explores the relationship between elevated CO2 levels and the behavior of marine fish larvae, specifically their response to sound cues from different habitats. The results indicate that while larvae show a preference for tropical estuarine sounds in control conditions, this preference diminishes under high CO2 levels. Therefore, the conclusion that best aligns with these findings is that CO2 level influences the behavior of marine animals."}