If we look at the other options:

2) Stable: A place where animals, typically horses, are kept.

3) Den: A secluded or private space, often associated with animals creating a shelter or a cozy room in a house.

4) Igloo: A specific type of shelter made of ice and snow, particularly associated with Arctic regions.

In this context, "Court" might be considered odd because it is associated with legal or sports-related activities, while the others are related to shelters, private spaces, or places for keeping animals.