Frogs call their young tadpolls.
young trout
A chick
infant
Alligators cannot speak, but humans call young alligators "hatchlings".
Young elephant.
An answerer, in this case, you can call him by his username, Ironnica
a polymath
A Brainaic
he answers a call of nature
No Usher does not call Justin Bieber young phenomenal.
A person who answers a survey is typically referred to as a respondent. They provide their feedback, opinions, or information in response to the survey questions.