Assess learners' ability to analyze the causes of nutrient pollution (point and nonpoint sources), transport pathways (surface runoff, groundwater flow, tile drainage, atmospheric deposition), key biogeochemical processes, and ecological impacts in freshwater lakes (algal blooms, hypoxia/anoxia, shifts in food webs); include interpretation of monitoring indicators, simple data or scenario-based diagnosis of eutrophication drivers, and evaluation of mitigation and management strategies.