Where would you display a picture on a horizontal surface?
Options:
- microwave
- desktop
- shelf
- art show
- wall Let's give stream of consciousness first:

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
Pictures displayed on a horizontal surface usually have frames. Shelf has a horizontal surface.
Therefore, the answer is shelf.