At different places one earth, depending on elevation, air pressure varies. What causes air pressure?

the sun’s energy
density of nitrogen
earth’s magnetic field
weight of air

Question

At different places one earth, depending on elevation, air pressure varies. What causes air pressure?
 		
	the sun’s energy
	density of nitrogen
	earth’s magnetic field
	weight of air

tygrr321 · Answer

wat do u think?
im thinking B

anonymous · Answer

I am guess D.

anonymous · Answer

I am thinking *

tygrr321 · Answer

well if u think about it air doesnt weigh that much
and the earths magnetic field has very little to do with air pressure

anonymous · Answer

I guess your right... hm... I'll take your word for it.

tygrr321 · Answer

yeah so now its just suns energy and density of nitrogen