Why do seashells have holes in them?

Related questions

1. What is bash language used for?
2. What is while true in Python?
3. Is there do while in Python?
4. Is equal to Python?
5. Is Python an operator?
6. What is mod in Python?
7. What is zombie process in Unix?
8. Is bash script a programming language?
9. What is the purpose of bash?
10. What is $? In Shell?

Tags

1. #small
2. #teeth
3. #shell
4. #snails
5. #seashell
6. #their
7. #secreting
8. #ribbons
9. #molluscs
10. #perfect
11. #nearly
12. #along
13. #would
14. #formed
15. #cause
16. #drilling
17. #which
18. #other
19. #chitinous
20. #soften
21. #radulas