Earth’s atmosphere is important to living things because it: A. contains dust and other particles.
B. is very thin compared to the size of Earth.
C. provides all the gases that living things need to survive.
D. maintains a constant relative humidity.

answer; (d) spontaneous processes are characterized by the overall conversion of order to disorder;

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

the rearrangement of particles in a physical change. hope this