Identify the layer of the atmosphere based on the facts listed below: i. The temperature remains nearly constant up to a height of 20 km and afterwards it gradually increases up to a height of 50 km due to the presence of the ozone layer. ii. It is a stable zone where clouds are mostly absent, with very little dust or water vapor, making it ideal for flying jet aircraft. Select the correct answer:

The atmospheric phenomenon known as 'Aurora Borealis' occurs in which layer of the atmosphere?

Which of the following represents the correct descending order of gases present in Earth's atmosphere by volume?

Consider the following statements regarding Earth's atmospheric layers: 1. The Troposphere contains almost all weather phenomena. 2. The Stratosphere is mostly free of clouds and contains the ozone layer. 3. The Mesosphere protects Earth by burning up most meteoroids upon entry. Which of the statements given above is/are correct?