Final answer:
The apex is the highest point on the top of the head, identifiable with the placement of a comb; it is a term often used in hair design.
Step-by-step explanation:
The apex is the highest point on the top of the head, and can be located easily by placing a comb on top of the head and noticing that the comb is resting on the highest point. The term apex is often used in the context of hair design and cosmetology to refer to this point. It is not to be confused with the occipital bone, which is located at the posterior part of the skull and forms the back and base of the cranium.