Question

abstract means :
being a single and separate person or thing
supremely favored
existing only in the mind
marked by practical hardheaded intelligence

Explanation:

The word "abstract" refers to concepts or ideas that exist only in the mind and are not concrete or tangible. The first option describes individuality, the second describes being highly - favored, and the fourth describes practical intelligence. Only the third option aligns with the meaning of "abstract".

Answer:

C. existing only in the mind