Answer:
Igneous rock , formed by the cooling of magma inside the Earth or on the surface.
Metamorphic rocks, formed by temperature and pressure changes inside the Earth.
Explanation:
Igneous and Metamorphic are formed in different ways,
Metamorphic rocks: arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock may be a sedimentary rock, an igneous rock or another older metamorphic rock.
Igneous rocks: began as magma (molten rock) which cooled and crystallized into minerals. This magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
Credit: http://www.geologyin.com/2016/06/top-7-differences-between-metamorphic.html
