Question

many extrusive volcanic rocks contain holes which have formed from ____. acidic reactions escaping gases quartz crystals underwater eruptions

Explanation:

When extrusive volcanic rocks form, gases dissolved in the magma escape as the magma cools and solidifies quickly on the Earth's surface, creating holes. Acidic reactions, quartz crystals, and underwater eruptions are not the direct cause of these holes.

Answer:

B. escaping gases