In two or three sentences, describe one of the principles of the constitution and identify its importance.

One of the principles of the Constitution is Checks and Balances. Checks and Balances is important because it makes the government in such a way that none of the three branches can gain a lot of power. That had been and still is a problem in forming democracies because usually one branch of government doesn't have enough power over the other two. 
Hope this helps! Please let me know if I'm wrong :)

Internal combustion engines