Evaluate learners' ability to analyze primary causes of freshwater eutrophication in lakes (e.g., agricultural runoff, wastewater effluent, atmospheric deposition), interpret ecological consequences (harmful algal blooms, hypoxia, biodiversity and food‑web changes, toxin risks), and assess mitigation strategies (riparian buffers, nutrient management, wastewater upgrades, biomanipulation, policy tools). Include interpretation of nutrient, chlorophyll‑a, and dissolved oxygen data and formulation of trade‑off aware management recommendations for specific lake scenarios.