What is the vegetation in much of southern china, taiwan, southern korea, and southern japan? how does it differ from the vegetation in mongolia?

Vegetation in southern china, taiwan, southern korea, and southern japan is significantly greater than those areas in the northern region of the country of Mongolia, is due to climate differences among these regions. The southern part of China and Korea are much closer to the equator or the tropic region which greatly supports plant life.

Ibelieve that a would be the best answer.

Ba population changes in response to a change in environment