Question

the _______________(or head) of a membranophone produces sound waves when struck.
options: air, skin, water, string

Explanation:

Membranophones are musical instruments that produce sound by vibrating a stretched membrane. The term "head" refers to this membrane, which is often called a skin (as seen on drums like the one pictured). The other options do not fit: air is for aerophones, water is not a standard membranophone component, and string is for chordophones.

Answer:

B. skin