Select the most appropriate one-word substitution for the given group of words.

A small enclosure for cattle, sheep, poultry etc. 

Pen 

he most appropriate one-word substitution for "a small enclosure for cattle, sheep, poultry etc." is pen.

• Den is a small, dark, and sheltered place where an animal lives.
• Hutch is a small enclosure for rabbits or other small animals.
• Saddle is a piece of equipment that is placed on a horse's back to allow a rider to sit on it.

The word pen comes from the Old English word "penn," meaning "enclosure." A pen is a small, fenced-in area where animals are kept. It can be made of wood, metal, or wire, and it is usually used to keep livestock.