Question

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

Explanation:

• "Increased crop yields" is a benefit of proper pesticide use, not a runoff consequence.
• "Faster breakdown of pesticides" is not caused by runoff; runoff spreads pesticides, not speed up breakdown.
• "Enhanced pest resistance" is a long - term result of pesticide overuse, not direct runoff.
• Pesticide runoff means pesticides flow into water sources, causing "contamination of water sources".

Answer:

contamination of water sources