Once the magma found at location "e" cools and crystalizes, it will
a) turn into lava.
b) form igneous rocks.
c) sink back into earth's deep interior.
d) form igneous, metamorphic, and sedimentary rocks.

Option (B)

Explanation:

The intruding magma sometimes gets cooled and crystallized beneath the earth's surface due to the lowering of temperature, as a result of which batholiths and plutons of various size are formed. These are large igneous intrusive bodies that are formed deep below the earth's surface. The plutons are generally larger in size in comparison to the batholiths. These rock bodies are sometimes exposed on the surface due to the erosion of the top layers.

For example, the Aswan Granite batholith that is present in Egypt.

Thus, in the given figure, the magma body that is represented by letter E undergoes cooling and crystallization and thereby forms an igneous rock.

Hence, the correct answer is option (B).