Question

which element(s) can be found in fertilizer and therefore contribute to eutrophication?
fluorine
nitrogen
phosphorous
potassium
nickel

Explanation:

Fertilizers commonly contain nitrogen and phosphorus. These nutrients can runoff into water - bodies and cause eutrophication, an over - enrichment of nutrients leading to excessive growth of algae and other aquatic plants. Fluorine, potassium, and nickel are not the main elements in fertilizers that contribute to eutrophication.

Answer:

B. Nitrogen, C. Phosphorous