Explanation:

- Option 1: Kennel

- A kennel is a place where dogs are bred and housed.

- It's commonly used for boarding and training as well.

- Option 2: Aviary

- ?? Correct Answer

- An aviary is a large enclosure for confining birds, allowing them space to fly and breed.

- Option 3: Apiary

- An apiary is where beekeepers keep and manage bees, particularly for honey production.

- Option 4: Den

- A den is usually a natural cave or hollow where wild animals live, like a lion’s den.