When The aurora borealis is caused by the which is a part of the thermosphere.?

The aurora borealis, or northern lights, is caused by the interaction of charged particles from the solar wind with the Earth's magnetic field and atmosphere, specifically in the thermosphere. When these high-energy particles collide with gases like oxygen and nitrogen, they excite these atoms, resulting in the beautiful light displays we see. The thermosphere, located between about 85 km to 600 km above the Earth's surface, plays a crucial role in this process as it contains the ionized particles necessary for the auroras to occur.