Answer:
Troposphere
Step-by-step explanation:
The troposphere is the lowest layer of the Earth's atmosphere. The earth's atmosphere has the following layers:
- Troposphere - Stratosphere - Mesosphere -Thermosphere - Exosphere
The troposphere lies 10 km above the land surface and most weather phenomena and conditions (e. g. clouds, turbulence) occur there.
Most of the water vapor in the atmosphere is in the troposphere (about 99%) and most of the atmosphere's mass is contained in the troposphere (75%)