Circle the molecule(s) in the atmosphere that come from animals. (circle all that apply) a. Carbon dioxide, CO,
b. Helium, He
c. Methane, CH
d. Oxygen, O2

A and C

Explanation:

A; Animals inhale and exhale, breath oxygen, leave carbon dioxide.

C; We fart, so do they! (farts are a release of methane gas from our bodies) Just ask my dog...

Hope this helped!

answerleaving cheese out to get moldy;