Which of the following statement is/are correct about Troposphere

Options

A. 1. The depth of this layer varies from about 8 to 16 kilometers
B. 2. Greatest depths occur at the tropics where warm temperatures causes vertical expansion of the lower atmosphere
C. 3. From the tropics to the Earth's polar regions the troposphere becomes gradually thinner
D. 4. All the above

Answer

D

Explanation

All statements are correct.1. The depth of this layer varies from about 8 to 16 kilometers . 2. Greatest depths occur at the tropics where warm temperatures causes vertical expansion of the lower atmosphere .3. From the tropics to the Earth's polar regions the troposphere becomes gradually thinner