Question

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

Explanation:

Pesticide runoff can flow into water sources like rivers, lakes, and groundwater. Pesticides are chemicals, and when they enter these water bodies, they can make the water dirty (contaminated). This is bad for the environment as it can harm aquatic life (fish, plants in water) and also affect humans if they use that water (for drinking, etc.). Increased crop yields is a result of using pesticides (not runoff consequence), faster breakdown of pesticides is about how pesticides degrade (not runoff effect), and enhanced pest resistance is due to repeated pesticide use (not runoff - related environmental issue). So, contamination of water sources is the environmental consequence of pesticide runoff.

Answer:

contamination of water sources