Which of the following is the lowermost layer of the earth’s atmosphere?

🔑Key Points:
Troposphere
-The lowest layer of our atmosphere is called the troposphere.
-It begins at ground level and rises to a height of approximately 10 kilometers (6.2 miles or 33,000 feet) above sea level.
-Nearly all weather occurs in the troposphere, where we people reside.
-Because the troposphere contains 99 percent of the atmosphere's water vapor, this is where the majority of clouds form.​

🔴Additional Information:
Stratosphere
-From the troposphere to roughly 50 km (31 miles) above the surface, the stratosphere is present.
-The stratosphere contains the protective ozone layer.
-High-intensity ultraviolet (UV) light from the Sun is absorbed by ozone molecules in this layer, which turns the UV energy into heat. 

Mesosphere
-The mesosphere is located above the stratosphere.
-It rises to an altitude of roughly 85 km (53 miles) above our planet.
-The mesosphere is where most meteors burn up. As you ascend through the mesosphere, temperatures drop once more, in contrast to the stratosphere.
Thermosphere
-The thermosphere refers to the layer of extremely rare air above the mesosphere.
-The thermosphere heats up to hundreds or even thousands of degrees as a result of the Sun's high-energy X-rays and UV radiation being absorbed there.