Question

Why does the author include the information about balloons?

Group of answer choices

to give the readers a comparison that will help them understand how air pressure works

to show why warm air rises and why cool air stays closer to the surface of the Earth

to prove that air that goes up somewhere must always come done somewhere else

to suggest the author's teacher was incorrect when he said "you don't get something for nothing"

Answer 1

A measured amount of helium is put into the balloon that will give it enough lift to get off the ground and ascend to the desired float altitude. As the balloon rises, the gas inside the balloon expands because the atmospheric pressure surrounding the balloon drops

Answer 2

We need to be able to read it to know why the author included information :)