B. <u>Areas that the river has abandoned due to meandering and incision</u>
Explanation:
Floods happen on flood plains the flat meadows adjacent to a stream channel. People like to build on flood plains because the land is flat and located conveniently close to water. The floodplain during its formation is marked by meandering and is occasionally completely covered with water. The floodplain is the natural place for a river to dissipate its energy.
