Answer:
I would have to say that the best app I use is duolingo.
Explanation:
I use duolingo and it is so good for learning any language you need.
Quando o Rio Carnival realizou? That is how you say it.
Do you mean what is a noun ?
This would be a cultural issue that is illustrated by that statement because the sentence talks about marriage between two people who speak different tongues. tongues are languages, so that sentence discusses the cultural issue of marriage between two people who speak different languages