Answer:
probably because most of our food comes from animals-
Explanation:
CO is not an element because CO is a Compound. Elements contain One capital and one lowercase letter. While Compounds contain two or more capital letters.
You can see a physical change always but not always a chemical
15. D is correct, exothermic reactions release heat
I am not sure about 16
Answer:
No.
Explanation:
The average distance to the center is over 6300km.
