Which kind of rock requires heat and pressure to form

Metamorphic Rock

Explanation: Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock. The parent rock can be either sedimentary, igneous, or even another metamorphic rock. The word "metamorphic" comes from Greek and means "To Change Form".

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?