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Extrusion is the feature form at Earth's surface from the cooling of lava.

What are extrusive igneous rocks?

They are the ones that originate from a sudden cooling of the incandescent magma when it comes to the surface, which means that there is no time for crystals to form, either partially or totally.

Characteristics of extrusive igneous rocks

  • These are rocks formed mainly by silicate minerals.

  • Pyroclastics are the product of explosive volcanic eruptions and contain rock fragments of different origins, they can be of many shapes and sizes.

Therefore, we can conclude that typical volcanic rocks are formed by the rapid cooling of lava and pyroclastic fragments.

Learn more about extrusive igneous rocks here: https://brainly.com/question/1340933

Answer:

A.

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