Final answer:
The Ngady Mwaash Mask includes a combination of materials such as wood, beads, cowrie shells, and fiber, creating a richly decorated helmet mask.
Step-by-step explanation:
The medium used in the Ngady Mwaash Mask combines multiple materials. The mask is known for being highly textured and decorated, featuring elements such as wood, beads, cowrie shells, and fiber, among others. In particular, the helmet mask (mwaashamboy) has wooden eyes, nose, and ears with added ornamentation comprising shells, beads, and cowries. These materials provide not just an aesthetic quality but also cultural significance, as seen in various traditional African masks.