Answer:
1. Fair use
2. Stacey uses parts of an older song in her new album that she wants to sell online.
3. Braxton makes a movie about his favorite superhero, using clips from various movies, and charges his friends to see it.
Step-by-step explanation:
1. Fair use is a doctrine in the law of the United States that permits limited use of copyrighted material without having to first acquire permission from the copyright holder.
2. Stacey is not allowed to sell someone else's work as her own without getting permission from the original owner.
3. Braxton is not allowed to charge his friends to see his "movie", which is someone else work compiled into one video, without getting permission from the owner of the movies.