A _______ is a lowland area that is shaped by a river, often having fertile soil. As such, it is a good place for farmers to practice _______ . The fertile soil made it easy to grow delicious crops like corn and wheat. Farmers in the area used freshwater from the river to _______ their fields. Also, the stable climate with regular rainfall is perfect for growing crops like corn and wheat. However, farmers have to be careful during heavy rainfall, as it sometimes led to _______. This can disrupt _______ , causing them to be unable to access their farms.