<span>Foliated rocks show different minerals or grains that have been segregated into layers or aligned nonrandomly. Quartzite is an example of a nonfoliated metaphoric rock. The main factor that changes rocks during contact metamorphism is both heat and pressure, but if had to choose one I would select pressure. When shale undergoes metamorphism it becomes slate!</span>
The answer is the second one. Deforestation of rain and forests and other parts of the world volcanic eruptions and widespread forest fires. This activity has contributed greatest amount of carbon dioxide into the atmosphere over the past 100 years.
