On an extremely warm day, the balloon might pop because gases expand the hotter they get, and due to its temperature it is likely to pop if it is, indeed, nearly, if not completely, filled to its capacity. I hope this helps, have a nice day!
Smooth, rough
Less, more
Fast, slow
Well, one of the theories was that Charles darwin proved that theory evolution is real so that one theory.
The answer is 3
I hope I helped