Assess students' ability to analyze how plastic, oil, and fertilizer pollution affect a small pond's plants, animals, and water quality. Items should include scenario-based questions that require cause-and-effect explanations (e.g., eutrophication, oxygen depletion, smothering, toxicity, bioaccumulation), interpretation of simple data (dissolved oxygen, turbidity, algal biomass), evaluation of impacts across food webs, and justification of practical remediation or prevention strategies at an upper-elementary (grades 3–5) advanced-analytical level.