Answer:
The correct option is D) They soak up excess water that can potentially lead to flooding.
Explanation:
A rain garden can be described as a depressed area in a landscape which comprises of plants like native shrubs and flowers. The primary purpose of building a rain garden is to hold and soak in rainwater. This causes to prevent a situation such as a flood because most of the excess water is trapped by the plants. Hence, situations such as erosion and flooding can be decreased by rain gardens.