Why do lakes, rivers, and streams most likely require more treatment than groundwater? A. They are classified as surface water resources

B. They experience fewer governmental regulations

C. They are exposed to a greater variety of contaminants

C. They are exposed to a greater variety of contaminants

Explanation:

it is a good conductor

explanation:

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: