Question

Which statement best describes the exosphere? It extends down to sea level. It is the place where meteors burn out. It is the layer where we observe lightning. It is the last layer of the atmosphere before space.

Answer 1

The exosphere is the outermost region of a planet's atmosphere.

So I would chose the last statement. "It is the last layer of the atmosphere before space." 

I hope this helps! 

Answer 2

**It is the last layer of the atmosphere before space.** Hope It Helped. :)