Enviar literally means 'to send', it's also Envoyer in French and similar in Italian and Spanish. 'Via' means road or path in Latin, so it's like sending an answer on its path.
Thank you for connecting the dots here. Envoy is also a word in English.
a messenger or representative, especially one on a diplomatic mission.
So someone who is sent to pass messages. :)
A diferenças em inglês. Estou fazendo o caminho reverso do duolingo agora (Inglês-PT)
One question regarding pronunciation:
The recording sounds like "El_ envi_ uma reposta"
Now should I practice reading it that way or should I still pronounce every single syllable?