Question

specifically what elements are found in the runoff that causes the algae blooms?mercury and ammoniaphosphorus and nitrogenprotein and fatoxygen and carbonrewatch

Explanation:

Algae blooms are driven by nutrient runoff that fuels rapid algal growth. Phosphorus and nitrogen are key limiting nutrients for algae; excess amounts from sources like fertilizer runoff trigger these blooms. The other options either contain toxic non-nutrient elements, organic compounds not in elemental form, or elements abundant in water/air that don't limit algal growth.

Answer:

phosphorus and nitrogen