Please help, I'll be giving brainliest. Prove that the rational numbers are closed under addition. Please let me know if I'm correct, and if not what the answer should be, I'll be giving brainliest.

That’s right my dude

Groups of skydivers need to navigate through the air during a jump to get into a formation How can skydivers who are below
the formation join the group? (1 point)
They can form their bodies into a ball to decrease the strength of gravity
They can spread their bodies to slow their acceleration
They can form their bodies into a ball to slow their acceleration
They can spread their bodies to decrease the strength of gravity