The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended upto 10 km from sea level, this layer is _________.
(i) Stratosphere
(ii) Troposphere
(iii) Mesosphere
(iv) Hydrosphere

Answer: Option (ii)
Solution:
The gaseous envelope around the Earth is called the atmosphere, and the lowest layer of this is known as the troposphere. It extends up to 10 km from sea level and is where we live and where weather occurs.

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