Answer:
The correct answer is methane . Nature constitutes most of the substances made up of organic compounds. These compounds have carbon atoms attached with hydrogen atoms with a chemical bond (very few compounds may not have this bond).
The control group outs the one that you don't change. The reason you don't change it is because you use it as a comparison with the other groups.
C.Xylem
Xylem is where the nutrients and water gets transported upward
Answer:
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