- Lighting a candle causes that candle to burn
- Fire causes burning
- So, lighting a candle is using fire to cause the candle to burn

- Lighting a candle is using fire to cause the candle to burn
- Fire is a kind of chemical reaction
- Hence, lighting a candle causes the candle to undergo chemical reaction

- Lighting a candle causes the candle to undergo chemical reaction
- Chemical change is a kind of chemical reaction
- Hence, lighting a candle causes the candle to undergo chemical change

Hence, lighting a candle causes the candle to undergo chemical change
Question
Which results in a chemical change?

Context
- Chemical change is a kind of chemical reaction 
- Fire is a kind of chemical reaction 
- Lighting a candle causes that candle to burn 
- Fire causes burning