The layer of atmosphere with the highest temperature is the

The thermosphere is the hottest layer of the Earth.

the layer of atmosphere with the highest temperature is the

Explanation:

In the thermosphere, the temperature increases with altitude, hence its name. The ionosphere is the fourth layer of Earth's atmosphere.

If the sun is active, the temperatures in the thermosphere can reach 1500 ° C and even higher.

The answer is: In the thermosphere.