ntA: In the middle to high latitude on a dark night an aurora or the curtain of light hangs down from the sky. This curtain is local, several hundred kilometer high, several thousand kilometer long but less than 1 km thick.n ntR: Electrons and protons trapped in the helical terrestrial magnetic field collide with atoms and molecules of air, causing that air to emit lightn ntn ntFIRST EXPLAIN THE ASSERTION AND THEN THE CORRECT REASONn

ntA: In the middle to high latitude on a dark night an aurora or the c

1.	ntA: In the middle to high latitude on a dark night an aurora or the curtain of light hangs down from the sky. This curtain is local, several hundred kilometer high, several thousand kilometer long but less than 1 km thick.n ntR: Electrons and protons trapped in the helical terrestrial magnetic field collide with atoms and molecules of air, causing that air to emit lightn ntn ntFIRST EXPLAIN THE ASSERTION AND THEN THE CORRECT REASONn
Answer» ntA: In the middle to high latitude on a dark night an aurora or the curtain of light hangs down from the sky. This curtain is local, several hundred kilometer high, several thousand kilometer long but less than 1 km thick.n ntR: Electrons and protons trapped in the helical terrestrial magnetic field collide with atoms and molecules of air, causing that air to emit lightn ntn ntFIRST EXPLAIN THE ASSERTION AND THEN THE CORRECT REASONn