Question

which phrase best describes igneous rocks? form when lava and magma cool accumulate sediments following erosion require heat and pressure to be formed consist of many sediment layers

Explanation:

Igneous rocks are formed from the cooling and solidification of magma or lava. Sedimentary rocks are formed by the accumulation of sediments (so options about sediments are for sedimentary rocks). Metamorphic rocks require heat and pressure to form.

Answer:

form when lava and magma cool