Which one of the following is enclosing the tympanum in mammals?

What are ear ossicles?

Which structure of the ear is responsible for the maintenance of the balance of the body?

Which maintains static equilibrium?

The Eustachian tube connects $A$ cavity with $B$. Choose the correct option for $A$ and $B$.

In the ampulla of the semicircular canal of the ear,sensory hairs are present. When balance is lost,it is maintained by the action of: