Answer :
If igneous rocks are exposed to energy from the Earth's interior and then millions of years later to energy from the Sun then they form metamorphic rocks.
What are Metamorphic rocks?
Metamorphic rocks are formed if igneous rock is exposed to the energy of the Sun as well as the Earth's interior for millions of years.
If igneous rock was first exposed to energy from the sun and for millions of years to energy from the Earth's interior then the igneous rock will change into metamorphic rocks because metamorphic rocks are formed when igneous rocks are exposed to intense heat energy and pressure.
The intense heat energy and pressure change the shape and form of the rocks and igneous rock will change into metamorphic rocks.
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