Oil is what the Mexican economy is based on.
Answer:
Coal it is formed when there is some heat and pressure conditions mixed together.
Explanation:
Depending the conditions are the stages of coal that are presented, the greater the pressure and heat, the higher rank appears (from peat, lignite, bituminous until anthracite).
During the Carboniferous period, in the Paleozoic Era, there were a collision among Laurasia (present day Europe, Asia and North America) with Gondwana (present day Africa), both part of the Pangea. As a result of the collision, Appalachian Mountain appears in North America and Hercynian Mountains in the UK. Giving a separation of both continents.
During this period, the mild temperatures, increases the tree ferns, plus the increases of the tetrapods, produce coal areas in both countries.
Hope this info is useful.
Answer:
you wouldn't expect to find fossils due; Still, the Alvarezes' hypothesis faced another hurdle: No dinosaur fossils had been found any higher than 3 meters below the K-T boundary, a gap which equates to about 100,000 years. Most researchers concluded that the dinosaurs went extinct before the asteroid impact and that they died off gradually.
I think the answer would be A