Answer:In the upper thermosphere, atomic oxygen (O), atomic nitrogen (N), and helium (He) are the main components of air. ... Earth's ionosphere, composed of several regions of such ionized particles in the atmosphere, overlaps with and shares the same space with the electrically neutral thermosphere. I hope that helps if not let me know and ill try my best to explain it better:)
Answer: a.
Explanation: because i got it right on a test i had
