Answer:
A.era
Explanation:
in this question era means was so when translated it say when I was a kid, i wanted to be a firefighter.
Hmm i assume you mean in spanish right? probably go with "Hola como estas ustedes, mi nombre es (insert name here). however i recommend waiting for someone a little more knowledgeable as i am from a less fancy part of Mexico and that's just how everyone is "polite" around my home town hope this helps
Answer:
this is Spanish section not math
I think it is formal it doesn’t say it formal but it does say the word usted is to show respect so i would say true its formal