- An animal is a kind of living thing
- If a living thing becomes too cold then that living thing will die
- Hence, if an animal becomes too cold then that animal will die

- If an animal becomes too cold then that animal will die
- Keeping warm is the opposite of becoming cold
- Therefore, an animal requires warmth for survival

- An animal requires warmth for survival
- If the environmental temperature is too cold then an animal in that environment may become cold
- So, an animal requires warmth for survival in cold temperatures

- An animal requires warmth for survival in cold temperatures
- Thick fur can be used for keeping warm
- Therefore, thick fur can be used for survival in cold temperatures by keeping warm

- Thick fur can be used for survival in cold temperatures by keeping warm
- Winter has cold temperatures
- Therefore, thick fur can be used for survival in winter by keeping warm

- Thick fur can be used for survival in winter by keeping warm
- When fur grows it becomes thicker
- So, some animals' fur grows thicker for staying warm in the winter

- Some animals' fur grows thicker for staying warm in the winter
- A rabbit is a kind of animal
- Therefore, a rabbit's fur grows thicker in the winter

So, a rabbit's fur grows thicker in the winter
Question: During which season of the year would a rabbit's fur be thickest?
Context: - Keeping warm is the opposite of becoming cold 
- If the environmental temperature is too cold then an animal in that environment may become cold 
- Thick fur can be used for keeping warm 
- A rabbit is a kind of animal 
- An animal is a kind of living thing 
- When fur grows it becomes thicker 
- Winter has cold temperatures 
- If a living thing becomes too cold then that living thing will die