question 5 of 10\nwhich must be true for metamorphism to occur?\na. the parent rock must be in liquid…

question 5 of 10\nwhich must be true for metamorphism to occur?\na. the parent rock must be in liquid form.\nb. the process must take place underground.\nc. the grain size must become smaller.\nd. the parent rock must be igneous.

question 5 of 10\nwhich must be true for metamorphism to occur?\na. the parent rock must be in liquid form.\nb. the process must take place underground.\nc. the grain size must become smaller.\nd. the parent rock must be igneous.

Answer

Brief Explanations:

Metamorphism is the change in the mineralogy, texture, and sometimes chemical composition of a rock due to changes in temperature, pressure, and chemically - active fluids. It occurs underground where rocks are subjected to high pressures and temperatures. A parent rock in liquid form would be magma or lava and is not undergoing metamorphism. The grain size can increase or decrease during metamorphism. Parent rocks for metamorphism can be igneous, sedimentary, or other metamorphic rocks.

Answer:

B. The process must take place underground.