sentence: Old rivers are the most useful type of river for growing crops.
sentences_before: As a river flows towards its mouth, the countryside around the river often changes from hilly to flat. As it flows over the flat land the river becomes wider and slower.
sentences_after: Corn, rice, fruit, cotton, hay, tobacco and sugar are some of the crops that are grown near old rivers.
concept_name: old river
headings: River About rivers The last part of a river
categories: Basic English 850 words Biomes