Two things that can disrupt a community?

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A. Three semicircular canals and two otolith organs

Explanation:

The vestibular system is the sensory system found in the inner ear. It helps in the coordination of balance and movement.

The vestibular system consists of two major parts : the semicircular canals which is responsible for rotational movements and are Three in number and the Otolith organ which is responsible for linear acceleration and are 2 in number.

The vestibular system sends signals mainly to the neural structures that control eye movements and to the muscles that keep an animal or human in their general control posture.