Which agent of metamorphism can cause the overall composition of the rock to change?
a. hydrothermal solutions
b. heat
c. pressure
d. time?

Respuesta :

The correct answer would be A. The agent of metamorphism that would cause for the overall composition of a rock to change would be hydrothermal solutions. These solutions contain mineral substances that are dissolved in the hot water. When in contact with a rock, the minerals may change the composition of the rock.
the correct answer is ( a )