Concept:This question tests knowledge of male-female animal names. Each pair should show a male and its corresponding female.Explanation:Option A: drake (male duck) and duck (female duck) – correct pair.Option B: gander (male goose) and goose (female goose) – correct pair.Option C: stag (male deer) and hind (female deer) – correct pair.Option D: sheep is the species name, not the male. The male is ram, and the female is ewe. So “sheep – ewe” is mismatched because it pairs a species with a female, not a male and female.Answer:Option D (sheep - ewe)