Why do sloths hang upside down?

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Tags

1. #below
2. #claws
3. #mammals
4. #spend
5. #visible
6. #their
7. #harpy
8. #branches
9. #energy
10. #growing
11. #upside
12. #makes
13. #eagles
14. #hanging
15. #sloths
16. #using
17. #indeed
18. #without
19. #branch
20. #opposite