What will happen with the co2 next? it will move out of the body. it will enter the blood. it will be carried to cells. it will undergo respiration.

Option A,  It will move out of the body

Explanation:

In the process of respiration, gases like oxygen and carbon dioxide are exchanged between the lungs, other body parts & systems and the environment .

After inhalation of oxygen, its concentration increases in the alveoli (air sacs of the lungs) and becomes greater than the oxygen concentration in the blood stream. Due to this concentration differences, Oxygen diffuses from the alveoli to the blood stream. Likewise, carbon dioxide diffuses from blood stream to alveoli due to concentration difference. Now this CO2 is expelled out of alveoli by the process of exhalation .

Hence, option A is correct

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relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .