If thunderstorms are caused when cold air advances on warm air, then where do thunderstorms come from?

Answer choices:
- Too much rain in the clouds
 - When the environment is too cold
 - Earth's axis of rotation is tilted
 - fissures of hot, acidic water
 - More than one trophic level.
 - it flows to a lower level
 - Dryness in the environment
 - When cold air advances on warm air

 

        When cold air advances on warm air  