Sarah lives in a house at the bottom of a hill. Every time it rains, water collects next to her house. Which of the following is the best possible explanation for this?
a. The rainwater is undergoing deposition on the hill.
b. The rainwater is transpiring from the tree leaves.
c. The rainwater is evaporating at the top of the hill.
d. The rainwater is not infiltrating into the ground.
