Which classification of hair is characterized by being coarse and thick?

The classification of hair characterized by being coarse and thick is terminal hair. Terminal hair is typically found on the scalp, face, and body in adults, and it is known for its strong structure. This type of hair is usually pigmented, longer in length, and can have varying textures, but it is distinctly different from other hair types in terms of density and strength.

In contrast, vellus hair is often fine, short, and lightly pigmented, primarily covering most of the body and being less noticeable. Lanugo hair refers to the fine, soft hair found on fetuses, which is also not coarse or thick. Intermediate hair is of a medium thickness and might show some characteristics of both vellus and terminal hair, but it does not reach the level of thickness and strength typical of terminal hair. Therefore, the distinctive characteristics of terminal hair set it apart as the classification noted for being coarse and thick.