The correct option is B Stratosphere
The stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. It is stratified in temperature, with warmer layers higher up and cooler layers farther down.
The stratosphere is layered in temperature because O3 here absorbs high energy UVB and UVC energy waves from the sun and is broken down into atomic oxygen (O) and diatomic oxygen.