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 lava or magma. Sedimentary rocks accumulate sediments (second and fourth options) and metamorphic rocks require heat and pressure to form (third option).

Answer:

form when lava and magma cool