- Classifying is when one sorts something by kind / type
- Stars can be classified by temperature, color, and brightness
- So, stars with different temperature, color, brightness will be classified into different types

- Stars with different temperature, color, brightness will be classified into different types
- Stars change type during their life cycles
- So, stars will change in temperature, color, and brightness during their life cycles

Therefore, stars will change in temperature, color, and brightness during their life cycles
Question: During its lifetime, which object is known to change in brightness, color, and temperature?
Context: - Stars change type during their life cycles 
- Classifying is when one sorts something by kind / type 
- Stars can be classified by temperature, color, and brightness