Which term would indicate a relationship to the brain?

The term "encephala" refers specifically to the brain and is derived from the Greek word "encephalon," which literally translates to "inside the head." This term encompasses various aspects relating to the brain, including its structure, functions, and associated disorders. It is commonly used in medical and scientific terminology to discuss conditions, diagnoses, or studies involving the brain.

The other terms provided do not relate to the brain. "Cutis" pertains to the skin, "cyst" refers to a sac-like structure filled with fluid or semi-solid material, and "cyte" is a suffix used in biology to denote a cell. Understanding these distinctions helps clarify why "encephala" is the most appropriate choice to signify a relationship to the brain.