Question

(d) In which layer of the atmosphere do airplanes fly?

(i) Mesosphere (ii) Exosphere
(iii) Troposphere
(iv) Tropopause​

Answer 1

(iv) Tropopause​

Step-by-step explanation:

Planes fly in the tropopause, and the areas immediately above of the stratosphere. The tropopause is the boundary between the troposphere and the stratosphere, and planes fly here because the troposphere is more turbulent and unstable.