which water source may become polluted as it travels over land?\nponds\n groundwater\n oceans\n runoff

Brief Explanations:

Runoff is water that flows over the land surface. As it moves, it can pick up pollutants like chemicals, debris, and sediment from the ground, roads, and other surfaces. Ponds are relatively stationary water - bodies, groundwater is below the surface and less likely to be polluted by over - land travel, and oceans are large water masses that are not directly polluted by just traveling over land.

Answer:

D. runoff