Final answer:
The technical name for the hair of the eyebrows is supercilia, distinguishing it from cilia that refer to hairlike structures on cells. Supercilia protect the eyes from irritants and play a role in nonverbal communication.
Step-by-step explanation:
The technical name for the hair of the eyebrows is d) supercilia. This term refers specifically to the hairs found above the eyes that serve several functions, such as protecting the eyes from sweat, dirt, and other irritants. The term cilia, while it may seem related, actually refers to the short hairlike projections that extend from certain cells, such as those lining the airways, and are not related to eyebrow hair. The hair matrix pertains to the region of a hair follicle where hair growth occurs, containing things like the hair follicle, the hair shaft, and a layer of basal cells. In the context of human anatomy and physiology, superilia is the correct term to use when referring to eyebrow hair.