Why is there a cat outside my house?

There could be various reasons why a cat is outside your house. Cats are known to roam and explore their surroundings, so it's possible that the cat is simply passing through or looking for food. Additionally, the cat may belong to someone in the neighborhood and has wandered away from home. If you're concerned about the cat, you may want to check for a collar or tag to see if it has an owner, or you can contact local animal services for assistance.