The correct answer is A. closed.
It is not fair to leave dogs loose because they can get into trouble. They can get lost, injured, or even killed. They can also scare people or other animals. It is important to keep dogs on a leash or in a fenced area when they are outside.
Option B, chained, is not the correct answer because it is not fair to chain a dog up. Dogs need to be able to move around and exercise. They also need to be able to socialize with other dogs and people. Chaining a dog up can cause them to become stressed and anxious.
Option C, tight, is not the correct answer because it is not fair to keep a dog in a tight collar or harness. Dogs need to be able to breathe and move their necks freely. A tight collar or harness can cause them pain and discomfort.
Option D, locked, is not the correct answer because it is not fair to lock a dog in a cage or room. Dogs need to be able to move around and exercise. They also need to be able to socialize with other dogs and people. Locking a dog in a cage or room can cause them to become stressed and anxious.