Sensations inform us of the position of the head in space by monitoring gravity, linear acceleration, and rotation.

The answer would be Vestibular Senses. Consciousness of body equilibrium and movement are checked by the vestibular system. The vestibular senses (the feelings of body rotation and of attraction and gravity) ascend in the inner ear; the sense organs are the hair cells that give off signals done in the auditory nerve.

object 2 because all the other ones are wrong