Agricultural pollution happens when rains and drainage carry

The correct answer is D. pesticides.

Agricultural pollution primarily occurs when chemicals like pesticides are washed away by rain or drainage systems into nearby waterways. This can harm aquatic ecosystems and contaminate drinking water. Pesticides are designed to eliminate pests but can have detrimental effects on non-target organisms and the environment when they enter the water supply. If you have more questions or need further assistance, feel free to ask!