Alan observed that a lot of soil from his garden swept off from after heavy rain. which is this process called? a. groundwater recharge b. snow melt c. infiltration d. surface runoff

The answer is D. Surface Runoff.

D. Surface runoff

Explanation:

The surface runoff is caused by a free flowing water coming from sources like river stream, oceanic water, rainwater. Such water is not absorbed by the soil. It erodes the soil.

On the basis of the above information , surface runoff is the correct option.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.