2. the troposphere is the bottom layer of earths atmosphere. based on what you know about weather and…

Brief Explanations:

The troposphere is the lowest layer of Earth's atmosphere, extending from the surface to about 7 to 15 kilometers high. It is the densest layer, containing approximately 75% to 80% of the atmosphere's total mass and 99% of its water vapor and aerosols. Because of this high concentration of moisture and air pressure, nearly all of Earth's weather phenomena—such as clouds, rain, and storms—occur within this layer. Additionally, temperature in the troposphere typically decreases with increasing altitude.

Answer:

The troposphere is the layer where almost all of Earth's weather occurs and contains the majority of the atmosphere's water vapor and mass.