Q: Why does warm air rise higher in the troposphere?


Read this paragraph and choose the correct option from the provided answers:

Air in the troposphere is warmer closer to Earth’s surface. Warm air is less dense than cool air, so it rises higher in the troposphere. This starts a convection cell. Convection mixes the air in the troposphere. Rising air is also a main cause of weather. All of Earth’s weather takes place in the troposphere.

 Choices:

- it is more dense than cool air

- It contains hydrogen

- it is less flourishing than cool air

- it is less dense than cool air


A:
it is less dense than cool air