Question

when a rock is altered by extreme heat and pressure, what type of rock is the result?
clastic
igneous
metamorphic
sedimentary

Explanation:

Metamorphic rocks form when existing rocks (igneous, sedimentary, or other metamorphic) are subjected to extreme heat (from magma or geothermal activity) and pressure (from tectonic forces). This process changes the mineral composition and texture of the original rock. Clastic rocks are a type of sedimentary rock formed from fragments of other rocks. Igneous rocks form from the cooling and solidification of magma or lava. Sedimentary rocks form from the accumulation and lithification of sediment (such as sand, silt, and organic matter).

Answer:

metamorphic