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

- A thunderstorm is a source of heavy rain
- Rain causes bodies of water to increase amount of water they contain
- Therefore, a thunderstorm can cause bodies of water to increase amount of water they contain

- A thunderstorm can cause bodies of water to increase amount of water they contain
- When a body of water receives more water than it can hold , a flood occurs
- So, a thunderstorm can cause bodies of water to flood

- A thunderstorm can cause bodies of water to flood
- A stream is a kind of moving body of water
- Therefore, a thunderstorm can cause a stream to flood

So, a thunderstorm can cause a stream to flood
Question
Which change is most likely caused by a thunderstorm?

Context
- A thunderstorm is a kind of storm 
- When a body of water receives more water than it can hold , a flood occurs 
- A stream is a kind of moving body of water 
- Rain causes bodies of water to increase amount of water they contain 
- A storm is a source of heavy rain