Pick from: 1. Movement. 2. growth. 3. attacking. 4. health. 5. reduced heat. 6. stay warm. 7. be cold. 8. prey.
Q: Fact 1: Some animals' fur grows thicker for staying warm in the winter. Fact 2: Mammals are animals with Fur. Given the two facts above, what do mammals use fur for?
A:
6.