Which of the following processes cause rocks to change from one type of rock to another? Choose all that apply:

Remains of old organisms getting buried.

Pressure from rock layers above.

Weathering and erosion.

Melting from the heat inside the earth.

answer they showed that organic molecules such as amino acids could be produced from inoragnic molecules;

what events in mexico's history might explain why the country continues to have difficulty improving social justice and economic opportunities for all people?