What is the structure of a statement in its negative form?

Based on the map, which arabian city will marco polo describe after kalhat if he continues northwest across the arabian sea?

Aman lives on the twelfth floor of an apartment building. every morning he takes the elevator down to the lobby and leaves the building. in the evening, he gets into the elevator, and, if there is someone else in the elevator -- or if it was raining that day -- he goes back to his floor directly. otherwise, he goes to the tenth floor and walks up two flights of stairs to his apartment.

What best explains why the character asagai is a symbol for heritage ?