Concept:A hart is a male deer, and its feminine form is a specific term for a female deer. Explanation:The word 'hart' refers to a male red deer. The correct feminine gender is 'roe', which means a female deer. The other options are wrong because: 'filly' is a young female horse, 'sow' is a female pig, and 'goose' is a female bird.Answer:Option C – Roe