The correct option is B Fluid inside the inner ear
The ear is divided into three parts: external ear, middle ear and inner ear. The external ear gathers sound and directs it towards the middle ear. The middle ear chamber consists of an eardrum and three small ear bones. These structures transmit sound vibrations to the inner ear fluid. The inner ear chamber is encased in a bony case and is filled with fluid. This fluid in the inner ear helps the body to keep balance.