Apaved blacktop parking lot was built on what was once a soil covered-field. this area will now experience increased runoff when rain occurs because the parking lot has -

Less permeability.

Explanation:

It due to the nature of the soil that water is able to move a get absorbed on the covered fields and is now experiencing an increase of the runoff from the rainfall.  As the parking lot is cemented and is made up of thick matter.

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