Identify the atmospheric layer from the given features A and B: A. Meteorites burn up in this layer on entering from the space. B. Temperature declines with increasing height in this layer.

The Mesosphere is the third layer of the atmosphere (about 50 to 80 km above the Earth) where meteoroids/meteorites entering from space burn up due to friction. Temperature decreases with increasing altitude in the mesosphere, reaching the coldest point at the mesopause. The troposphere also has decreasing temperature with height but does not burn meteorites. The stratosphere has increasing temperature, and the thermosphere has rapidly increasing temperature with height.