depleting the ozone layer burning gasoline in car engines throwing trash out of car windows allowing runoff from agricultural fields
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which human activity directly affects the quality of freshwater resources?
Possibilities:
- depleting the ozone layer
- burning gasoline in car engines
- throwing trash out of car windows
- allowing runoff from agricultural fields

allowing runoff from agricultural fields