Final answer:
The word 'variety' can be replaced with the synonym 'diversity' in the given sentence.
Step-by-step explanation:
Synonyms are words or phrases that have similar meanings, conveying comparable concepts, ideas, or feelings. They provide variety in language and allow writers and speakers to choose different words to avoid repetition and add nuance to their expression.
The underlined word 'variety' in the given sentence can be replaced with the synonym 'diversity' from the thesaurus. In this context, 'diversity' refers to the range or assortment of different students within the building, reflecting the residents of the area.