- Rain is a kind of precipitation
- A storm is a source of precipitation
- Therefore, a storm is a source of rain

- A storm is a source of rain
- A thunderstorm is a kind of storm
- So, a thunderstorm is a source of rain

- A thunderstorm is a source of rain
- Cold fronts cause thunderstorms as they pass by
- Hence, cold fronts can cause thudnerstorms of rain as they pass by

Hence, cold fronts can cause thudnerstorms of rain as they pass by
Question: Cumulonimbus clouds often form along cold fronts. Which type of weather is most likely to occur along a cold front?
Context: - A thunderstorm is a kind of storm 
- Rain is a kind of precipitation 
- A storm is a source of precipitation 
- Cold fronts cause thunderstorms as they pass by