If a person has difficulty maintaining balance, which part should be checked carefully?

Correct answer: Cerebellum

The governing concept is nervous coordination. The cerebellum integrates information from the eyes, inner ear and muscles to coordinate posture, balance and precise voluntary movement. Damage or dysfunction in this region can cause unsteady movement and difficulty maintaining balance. The pancreas and thyroid are endocrine organs, while skin mainly acts as a receptor, so option A is the appropriate answer.