Which term refers to rocks that change from one type to another type? 

A)  rock consolidation 
B)  petrography 
C)  the rock cycle 
D)  rock metamorphism

Rock Cycle

The continuous process by which rocks are formed, broken down, and transformed into new rock types, driven by forces within the Earth and on its surface.

Rock Metamorphism

The process by which the mineral composition and structure of a rock is changed by heat and pressure over time.