Use reasoning to answer the following question.
There is a landing at the top of what that you walk up?\nOptions:\n- stairwell\n- ocean\n- airport\n- ladder\n- apartment building

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.

There is a landing at the top of a stairwell that you walk up.

.

Thus, the answer is stairwell