(d) In which layer of the atmosphere do airplanes fly? (i) Mesosphere (ii) Exosphere
(iii) Troposphere
(iv) Tropopause​

Troposphere

Explanation:

Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; the air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere.

With 5,640 species of flowering plants, Tamil Nadu ranks first among the States in the country in angiosperm diversity. It accounts for nearly one-third of the total flora of India.

Explanation:

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