What part of the ear holds the eardrum in place?

The annulus is the correct answer because it refers to the fibrous ring that holds the eardrum (tympanic membrane) in place on the edge of the tympanic cavity. This structure provides a secure attachment for the eardrum, helping to maintain its integrity and position so that it can effectively vibrate and transmit sound waves to the middle ear bones.

The incus, malleus, and stapes are all bones in the middle ear collectively known as the ossicles. While the malleus is directly attached to the eardrum and plays a crucial role in transmitting sound vibrations, it does not specifically hold the eardrum in place. The stapes, the innermost bone in the chain, transmits vibrations to the inner ear. Thus, while these bones are essential for the hearing process, they do not have the function of securing the eardrum as the annulus does.