Explanation:

- Option 1: Troposphere

- The troposphere is the lowermost layer of Earth's atmosphere.

- It extends from the Earth's surface up to about 8-15 kilometers.

- Weather phenomena like rain and clouds occur here.

- Correct Answer!

- Option 2: Mesosphere

- Located above the stratosphere.

- Extends from about 50 to 85 kilometers above the Earth.

- Option 3: Thermosphere

- Above the mesosphere.

- Extends from about 85 to 600 kilometers.

- Option 4: Exosphere

- Outermost layer.

- Extends from 600 kilometers up to 10,000 kilometers.