Question

1. water pollution from runoff comes mainly from ______.

○ industry
○ ocean dumping
○ agriculture
○ sewers

Explanation:

Agricultural runoff, carrying fertilizers, pesticides, and animal waste, is a primary source of water pollution from runoff. Industry and sewer pollution often involve direct discharge rather than runoff, while ocean dumping is direct disposal into oceans, not runoff-based.

Answer:

B. agriculture