There is a landing at the top of what that you walk up?
Options:
- stairwell
- ocean
- airport
- ladder
- apartment building Let's think step by step:

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
Stairwell is a shaft in a building in which a staircase is built. Stairwell is a compartment extending vertically through a building in which stairs are placed. There is a landing at the top of a stairwell that you walk up. So, the answer is stairwell.