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jeka57 [31]
3 years ago
10

Help quick please!! Thanks

Geography
2 answers:
yawa3891 [41]3 years ago
8 0
The answer is oxygen bro
suter [353]3 years ago
4 0
Answer: Oxygen

------

Respiration is the use of oxygen to produce energy. Oxygen, or O_2, is also created as a by-product of photosynthesis during the light-dependent reactions. The photolysis, or breaking down of water, H2O, during photosynthesis, created oxygen as a by-product.
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