1. Is it animate? No.
2. Is it an essential item for life? Yes.
3. Is it liquid in a normal state? No.
4. Is it edible? No.
5. Is it an element from the periodic table? No.
6. Is it air? No.
7. Is it related to plants? No.
8. Is it a kind of shelter? No.
9. Is it tangible? Yes.
10. Is it the sun? No.
11. Is it bigger than a dog? No.
12. Is it something that is needed atleast every 12 hours? Yes.
13. Does it require sitting or lying down? No.
14. Is it something needed atleast every 3 hours? No.
15. Is it related to carbon? Yes. (I'm 99% sure.)
16. Is it clothing? No.
17. Is it a solid? Yes.
18. Is it wood? No.
19. Is it our body? No.
20. Is it sugar? No.