Final answer:
Peter's problem with his semicircular canals likely affects his balance due to the key role these structures play in the vestibular system, which is separate from the auditory system.
Step-by-step explanation:
If Peter has a problem with his semicircular canals, this probably means that he has trouble with his balance. The semicircular canals, located within the inner ear, play a critical role in our sense of balance and equilibrium. These three ring-like structures contain fluid and hair cells that can detect rotational movements of the head. When disruptions occur, such as those caused by conditions like Benign Paroxysmal Positional Vertigo, one can experience periods of dizziness and lose their sense of balance.
Ménière's disease, another condition affecting the inner ear, can similarly result in both balance and hearing issues. It is important to note that the semicircular canals are part of the vestibular system, which is distinct from the auditory system that includes the malleus and incus bones and is involved in hearing. Therefore, a problem with the semicircular canals typically would not impact a person's hearing or speech clarity directly.