Question

which of these is an environmental consequence of pesticide runoff?
increased crop yields
contamination of water sources
faster breakdown of pesticides
enhanced pest resistance

Explanation:

• "Increased crop yields" is a positive effect of pesticide use, not a consequence of runoff.
• "Contamination of water sources" occurs when pesticides from runoff enter water bodies, harming the environment.
• "Faster breakdown of pesticides" is not a typical consequence of runoff; runoff spreads pesticides, not speed up their breakdown.
• "Enhanced pest resistance" is a result of repeated pesticide use over time, not runoff.

Answer:

B. contamination of water sources