The answer is C
Why:
A - this is natural
B - water is natural
D - this is also natural
C- this is right because when we breathe out we produce more carbon dioxide then we breathed in.
Explanation:
I have a dog in my dog is a girl
Combustion reactions release energy in the form of heat.
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Answer:
endoplasmic reticulum (ER)
Recycling!! And also planting more trees.
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