Which of the following is an oxidation-reduction reaction?
• so2(g) + h2o(1) h2so3(aq)
• caco3(s) , cao(s) + co2(g)
ca(oh)2(s) + h2co3(1) caco3(aq) + 2h2o(1)
• csh1206(s) + 602(9) _ , 6c02(g) + 6h20 (7

C₆H₁₂O₆ + 6 O₂ ⇒ 6 CO₂ + 6 H₂O

This is an oxidation-reduction reaction, because oxidation numbers of carbon and oxygen atoms are different than before reaction.

(-_-(-_-)-_-)

here is a answer

Explanation:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaledoxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide movesfrom the blood in the capillaries to the air in the alveoli.

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