Iwill give brainliest but answer only if you're sure you're right choose the best spanish translation. are you from ecuador? ¿estás de ecuador? ¿están de ecuador? ¿es usted de ecuador? ¿son de ecuador?

¿Es usted de Ecuador? Is the correct answer

The questions is about "the best", so I'd choose ¿Es usted de Ecuador?

Estás o Están de Ecuador NO son gramaticalmente correctas

"¿Son de Ecuador?" = "Son ellos/ellas de Ecuador"
pero también = ¿Son ustedes de Ecuador?

Keep in mind that "son" in Spanish not only applies to the 3rd person plural, but also for the "formal" ustedes: ustedes son.
Also the personal pronoun is really often skipped.

Since in "are you from Ecuador" that "you" in English could be singular or plural. Both answers are correct

NB: I'm a native speaker from Spain.

For this question, it will be important to use the words "mejor" (better), "lo mejor" (the best), and "lo peor" (the worst). while "mejor" is comparative (you are comparing one thing to something else), "lo mejor" and "lo peor" are superlative (there is nothing else better or worse than what these words are describing - there is no comparison).  you could say something like: la música rap es mejor que la música clásica - que es lo peor - pero la música rock es lo mejor de todas las formas de la música (rap music is better than classical music - which is the worst - but rock music is the best out of all the forms of music).

You lose experience for asking questions.  you gain experience for answering questions.i hope this !