Come up with a question and stream of consciousness reasoning that would justify this answer: caged in

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The question is: It's dangerous to let pet birds free so it's better to keep them what?
Options:
- slavery
- caught
- caged in
- topfree
- prisoner
Stream of consciousness: Companion birds are kept in cages because they are not used to roam in the wild.
