What type of hair is characterized as being deep, coarse, and usually pigmented?

The term that describes hair that is deep, coarse, and typically pigmented is terminal hair. Terminal hair is thicker and longer compared to other types of body hair, such as vellus hair, which is fine and usually unpigmented. Terminal hair is commonly found on areas of the body such as the scalp, face, armpits, and pubic region, especially after puberty when hormonal changes stimulate its growth.

Lanugo, which is a fine, soft hair, is usually found on fetuses and is eventually replaced by terminal or vellus hair after birth. The term superfluous generally refers to hair that grows in excess or in unwanted areas, but it does not specifically describe the characteristics of the hair itself. Thus, terminal hair is distinct in its coarseness and pigmentation, making it the correct choice for this question.