Final answer:
A feasible way to control harmful algal blooms in lakes is by lowering the nutrient levels and implementing biomanipulation. option d is answer
Step-by-step explanation:
To control harmful algal blooms in lakes, a feasible way is to lower the nutrient levels in the water by reducing the input of nitrogen and phosphorus. This can be achieved by managing sewage and controlling runoff from fertilized lawns and farms.
Lowering the nutrient levels helps prevent excessive growth of algae and the subsequent oxygen depletion that leads to dead zones. Biomanipulation, which involves controlling the biological assemblage of organisms in the lake, can also be effective in controlling harmful algal blooms. option d is answer