Answer:
C.) A low-lying floodplain that had rich soil.
Step by Step Explanation:
- Flood-plains are the large, flat expanses of land that form either side of the river.
- A flood-plain is the area around the river that is covered with river water in the times of flood.
- A flood-plain area is a very fertile land due to the high alluvium sediment by floodwaters.
- This process makes flood-plains a good fertile land for agriculture.
- The build of alluvium on the banks of rivers can create a natural dam which can increase the river bank.