1, 2, & 4 are ways it benefits students. The other two choices seem to be more about study skills rather than student self reflection benefits.
The length of a square is 4 times A where A is the edge length
Countries would be able to increase their productivity for the services with comparative advantage. A country then can sell products they produce efficiently and also would buy from other nations the products that they cannot produce. The comparative advantage can lose if there are competitors operating in a low wage country.
Answer: Ozone is an alternative version of oxygen. Oxygen or (O2) in the air we breathe is actually two molecules of oxygen attached together. Ozone is three atoms of oxygen attached together forming a molecule that is O3.
