Metamorphic rock is changed into igneous rock by A) weathering and erosion. B) sedimentation and lithification. C) heat, pressure, and chemical activity. D) melting followed by cooling and solidification.

D) melting followed by cooling and solidification

Answer

Metamorphic rock is changed into igneous rock by melting followed by cooling and solidification

Explanation

Igneous rocks are formed when the magma undergoes cooling and form crystals. Magma is a very hot liquid formed by melted minerals. When metamorphic rocks are exposed to intense heat and pressure, they undergo melting to form magma which with further cooling form igneous rocks.