I would say the last one but it could also be the second one<span />
Answer:
WWhat is April 23 Children's Day and where is it celebrated?
Answer:
Yes.
Explanation:
The sentence ended, so to not confuse the reader, add a period to let them know it has ended.
I would sell ice-scream in the Arctic by focusing more about the taste of the ice-scream, instead of the temperature of the ice-scream. And persuading them into wanting to taste what I’m talking about.