Question

which type of rock forms when an existing rock changes under extreme pressure and intense heat? choose one option a igneous b sedimentary c metamorphic

Explanation:

To determine the correct rock type, we analyze each option:

• Option A (igneous): Forms from cooled magma or lava, not from existing rock under pressure/heat.
• Option B (sedimentary): Forms from sediment deposition and compaction, not from extreme pressure/heat on existing rock.
• Option C (metamorphic): Defined as rocks formed when existing rocks (igneous, sedimentary, or other metamorphic) undergo changes due to extreme pressure, intense heat, or chemical processes. This matches the description in the question.

Answer:

C. metamorphic