Identify two activities that happen during a quinceanera celebration that may show the girl is becoming an adult

There is the "Changing of Shoes." This is when one of the girl's parents take off her shoes and replace it with a pair of heels. This symbols growth and responsibility; it's also a way to symbolize her becoming an adult. 

There is the "Dance with the Father." This is just the first dance of the party, the girl, and the father will do a dance. It emphasizes the role of the father.