Answer:
Option B
Step-by-step explanation:
Terrance farming is practiced in regions of high erosion of soil. Thus, this approach prevents soil erosion and conserved water. Terraces reduced the speed of water as it moves down and hence restricts the force of soil erosion thereby preventing soil erosion to a great extent. This practice also allows very intensive cropping.
Thus, settlers in early Japan developed terraces to prevent flooding of their fields