Maria and rosie are sisters talking together after school. their language is peppered with slang and popular phrases. when an adult friend of the family stops to say hello, their language immediately becomes more formal and polite, illustrating:

Since it has to be formal and polite you can start with basic of starting  conversation as the question said "the adult friend stops to say hello" they should respond "Hi, how are you".

Select the word from the list that best fits the definitionstates the the universe is expanding

Unfortunately, this is something i can't you with, because i am not you. but i can tell you what to do.so think about times when you met with people with a different ethnic group as you and describe how they acted and also describe time when you may have showed your own feelings and they way you see things about life.    i hope i you somewhat,