"Intrusive" igneous rocks have larger grains because the magma (being underground) cools more slowly allowing for development of larger mineral crystals.
(Intrusive" igneous rocks; have; larger grains because the magma (being underground) cools more slowly allowing for development of larger mineral crystals) (the magma; being; underground) (cools; more slowly allowing; for development of larger mineral crystals)
Intrusive" igneous rocks the magma cools
have being more slowly allowing
larger grains because the magma (being underground) cools more slowly allowing for development of larger mineral crystals
underground
for development of larger mineral crystals