The correct option is A Pen
A small enclosure for cattle, sheep, poultry is called a pen, Option C. Option A, 'Cellar' is a room below the ground in a house to store wine or coal. Option B 'Sty' means is a small enclosed place where pigs are kept. Option D 'Lair' is a place where wild animals live, often underground or hidden. Thus, options A,B and D are incorrect and correct option is option C, Pen.