Question

multiple - choice question
how do igneous rocks form?
cooling and solidification of magma or lava
heat and or pressure
weathering and erosion

Explanation:

Igneous rocks are formed when magma (under - ground) or lava (on the surface) cools and solidifies. Heat and pressure form metamorphic rocks, and weathering and erosion are processes related to the breakdown and transportation of rocks, not their formation as igneous rocks.

Answer:

Cooling and Solidification of Magma or Lava