Sex-specific names within a species: “Horse : Mare” (adult female horse). Choose the option that mirrors “species : adult female of the species.”

Introduction / Context:
Many animals have sex-specific names. The pair “horse : mare” encodes “species : its adult female.” We must select an option with the same mapping.

Given Data / Assumptions:
Female fox is “vixen.” “Doe” is female deer, not bullock (a male bovine); “vulpine” is an adjective meaning “fox-like”; “monk” and “monkey” are unrelated; “bee : hen” mismatches categories.

Concept / Approach:
Pick “Fox : Vixen,” the direct female term for the species fox.

Step-by-Step Solution:

Verification / Alternative check:
Dictionaries list vixen as the adult female fox.

Why Other Options Are Wrong:
They mismatch species, sex, or part of speech.

Common Pitfalls:
Confusing adjectives (vulpine) with nouns naming the female animal.

Final Answer:
Fox : Vixen