Answer the following question given this paragraph: 

Metamorphic rocks start off as some kind of rock. The starting rock can be igneous, sedimentary or even another metamorphic rock. Heat and/or pressure then change the rock’s physical or chemical makeup.


Q: What kind of rock's makeup is changed by heat and or pressure?

 Choices:

- tectonic

- basaltic

- igneous

- metamorphic

A:
metamorphic
