When the solar wind collides with atoms and molecules in earth's upper atmosphere, what is created?
a. auroras
b. neutrinos
c. radio waves
d. x-rays and gamma rays

I believe it is A. Auroras. I hope this helps you.

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.