Ide say c is the best option here but i wouldent bank on my answer.
The reason why stars does not die when it is there time is because they tend to fuse in different and more heavier elements. In that way, it prevents them from dying for they were able to have the components of different elements, extending their lives and prevent themselves from dying on the time that they were supposed to.
Answer: mesosphere
Explanation: because I am studying it right now
Generally, temperature increases. as altitude increases ! <span>However, the temperature increases with altitude in some layers. This is called an inversion. Inversions can appear at any altitude in the troposphere.
(NOTE: its Troposphere not Stratosphere)</span>