Which type of rock is most likely to form because of high heat and pressure? igneous magma sediment metamorphic

Igneous.

Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusiverocks or on the surface as extrusive rocks. 

Physical systems is the answer