The primary source of fuel in south america is petroleum.
The answer is the value of the information in this page is about money in this information you have to write the formula that will be density equal mass divided by volume that you put equal then you add and add then you will get the answer
As with igneous and sedimentary rocks, metamorphic rocks are classified on the basis of texture (grain size, shape, orientation) and mineral composition. However, the classifiction of metamorphic rocks is more difficult to get into than with igneous and sedimentary rocks, for a couple of reasons.