sometimes it depends, even when u have straight bottom teeth u might need them on the bottom for another reason.
No you just need to know how to sing well.
To keep the teeth together. Sure your braces will make your teeth straight but they can open up a gap again ( if that is the reason you needed braces). So a retanier will only keep the teeth straight
Yes, it is possible for straight teeth to be a part of one's genetic makeup, as can crooked teeth.
Yes
No, braces are for making teeth straight. If you have other problems go to the dentist.
They were never not straight.
It depends how bad it! My friend she had buck teeth but when she got older her teeth started to expand and grow together and be straight. So go to the dentist they will tell u if u need braces are not!
from scandinavia
Get braces
i don't think she has teeth
No, because everyones teeth grows in different ways, some peoples teeth might be straight and others might be crooked but its not there fault.