Us; object of a preposition.
Idk how to explain im sorry if i figure out i will tho XD
In general, it's often best to choose the shorter, cleaner, and simpler word when choosing between two words for a piece. In writing, simplicity and clarity are crucial.
Mia's cat
Mark's crayons
Dad's arms
Clint's shirt
Sarah's tools
Hope this helps.
No, that answer is correct but there are also some other ways such as Learning new languages, reading multicultural books, Celebrating world holidays and much more.