Marble,slate and gneiss are

Marble, slate, and gneiss are all examples of metamorphic rocks. Metamorphic rocks are formed when existing rocks are subjected to high pressure, heat, and/or chemical changes over long periods of time. Marble is formed from limestone or dolomite that has been exposed to heat and pressure. Slate is formed from shale or mudstone that has undergone intense pressure and heat, causing the minerals to recrystallize into thin layers. Gneiss is formed from pre-existing rocks such as granite, which have undergone high heat and pressure causing the minerals to rearrange into bands. In summary, all three options are examples of metamorphic rocks, which are formed by the alteration of existing rocks due to high pressure, heat, and/or chemical changes over time.