When sedimentary rock is subjected to heat and pressure, it transforms into metamorphic rock.

Here's why:

* Sedimentary rocks are formed from the accumulation and cementation of sediments like sand, mud, or organic matter.

* Heat and pressure cause the minerals within the sedimentary rock to recrystallize and rearrange. This process changes the rock's texture, mineral composition, and sometimes even its chemical composition.

Examples of metamorphic rocks formed from sedimentary rocks include:

* Marble (from limestone)

* Slate (from shale)

* Quartzite (from sandstone)

Let me know if you'd like to know more about the process of metamorphism!