5. solidified lava flows and volcanic ash deposits are examples of

a. intrusive igneous rocks.

b. extrusive igneous rocks.

c. both intrusive and extrusive igneous rocks.

d. neither intrusive nor extrusive igneous rocks.

b. Extrusive igneous rocks.

Explanation:

Extrusive rocks are rocks from magma that were thrown at Earth's surface while intrusive rocks are the ones from magma which were forced into rocks in the Earth’s crust.

When the lava and volcanic ash get to the surface, the rocks that are formed are extrusive igneous rocks.

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