Which cranial nerve is responsible for controlling eyebrow movement?

The cranial nerve responsible for controlling eyebrow movement is cranial nerve VII, also known as the facial nerve. This nerve is primarily responsible for innervating the muscles of facial expression, including those that move the eyebrows. When the facial nerve is stimulated, it allows for actions such as raising the eyebrows, frowning, and closing the eyes.

Cranial nerve II, commonly referred to as the optic nerve, is involved in vision and does not control any muscles related to eyebrow movement. Cranial nerve VI, known as the abducens nerve, is responsible for lateral eye movement and does not have any effect on the facial muscles. Cranial nerve VIII, also known as the vestibulocochlear nerve, is responsible for hearing and balance, and likewise does not relate to eyebrow movement. Therefore, the correct answer is clearly cranial nerve VII, as it plays a direct role in the voluntary movements of the muscles that control the eyebrows.