Igneous rocks formed below earths surface
a) igneous rocks
b) extrusive
c) intrusive
d) lava

The answer is C. Instrusive

Explanation:

The ingneas rocks are those that form when the magma cools and reaches a solid state. When this type of volcanic rock cooling occurs below the surface of the earth's crust, it is known as intrusive rocks. This type of igneous rock is formed from the magma that has solidified, creating crystals.

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it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.