34. The                 is the layer of the atmosphere closest to Earth. ozone layer stratosphere troposphere thermosphere

The correct answer is the troposphere.

The troposphere is the lowest layer of Earth's atmosphere, extending from the surface up to about 8 to 15 kilometers (5 to 9 miles) depending on geographical location and weather conditions. It is where we live and breathe, and it contains approximately 75% of the atmosphere's mass and almost all of its water vapor and aerosols. Temperature decreases with altitude in this layer, resulting in the weather patterns we experience daily, including clouds, rain, and storms. The ozone layer is found higher up in the stratosphere, which is the layer above the troposphere. The thermosphere, located even higher, is characterized by high temperatures and thin air, where phenomena such as the auroras occur.