Final answer:
The incus articulates with the head of the malleus. Together with the stapes, these ossicles transmit sound vibrations to the inner ear.
Step-by-step explanation:
The ossicle that articulates with the head of the malleus is the incus. The malleus, which is also known as the hammer, is one of the three auditory ossicles in the middle ear that work together to transmit sound vibrations to the cochlea.
The malleus is directly attached to the tympanic membrane, and it connects to the incus, which in turn is connected to the stapes. This unique arrangement of ossicles is found only in mammals and helps amplify and transfer sound from the outer ear to the inner ear.