Use reasoning to lead to the answer of the following question:
You'll find a landing at the top of what?\nOptions:\n- ocean\n- apartment building\n- stairwell\n- airport\n- room

stairwell
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.

You'll find a landing at the top of stairwell.

.

Therefore, the answer is stairwell