What is the difference between "Represent" and "Make up"? and when to use each?<br/><br/>"Rainforests <i><b><u>make up</u></b></i> about seven percent of the earth's land surface."<br/><br/>Why was "make up" used and not "represent"?<br/><br/><i><b>note: I "feel" that it's "make up" but I don't know why it is.</b></i><br/><br/>Thanks in advance,<br/>Shimo