Answer:
it has to be b because of the other ones are wrong
Vegetation in southern<span> 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.</span>
Pretty sure its called the 38th Parallel, or the Demilitarized Zone. :)
"In republics, citizens have less direct control over government. ... (c) Why do some people hold that the United States is more properly called a republic rather than a democracy? In a Democracy there is no need for a Constitution, since the majority can simply change Law at a whim."
From google
