.Oxygen free environments
.Concentrated salt water and hot
. Acidic water of sulfur springs
Compounds are made up of elements.
Elements are the ones we pull straight out from the periodic table.
For example:
H2O, HCl, NaCl, NaOH --> these are all compounds
H, N, B, Ne, Na, Cl, O, K --> these are all elements.
I think the correct answer from the choices listed above is option A. For metamorphism to occur, the parent rock must be in solid form. Metamorphism is the alteration of the structure of a rock by factors like heat and temperature so it must be the material should be in solid form.
I think the answer is -
when the body experiences a drop in temperature it forces the water molecules to move faster in order to break the hydrogen bonds and release energy as heat.
hope this helps you.