Question

which activity is most likely to directly pollute local streams?
a. hog farming
b. automobile manufacturing
c. gravel mining
d. crop rotating

Explanation:

Hog farming can lead to direct pollution of local streams. Manure from hog farms can contain nutrients (like nitrogen and phosphorus), pathogens, and other contaminants. If not properly managed (e.g., through runoff from fields where manure is spread, or leaks from manure storage facilities), these pollutants can enter local streams. Automobile manufacturing typically has pollution control measures in place and its pollution is more industrial - process related (like air pollution from manufacturing processes rather than direct stream pollution in most cases). Gravel mining can cause sedimentation in water bodies but is not as directly associated with the kind of chemical and biological pollutants from hog farming. Crop rotating is a sustainable agricultural practice that is more about soil health and reducing pests/diseases rather than direct stream pollution.

Answer:

A. hog farming