Question

the best action humans can take to decrease the effect of harmful growth and reproduction of algae is to ban the use of fertilizers. decrease crop production. control the use of fertilizers. use other chemicals.

Explanation:

Excessive nutrients from fertilizers can cause algal blooms. Banning fertilizers would be extreme and decrease in crop production is not a practical solution. Using other chemicals may not address the root - cause. Controlling fertilizer use can reduce nutrient runoff that fuels harmful algal growth.

Answer:

C. control the use of fertilizers