Answer:
photosynthesis
Explanation:
If you are referring to the chemical breakdown of food in PLANTS, not humans, then your answer is photosynthesis.
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The pacific plate moved over the hot spot, and the string of islands that make up the Hawaiian island chain were formed.
D. it is a full adult frog.
The only independent variable in this experiment is the amount of nitrogen Sarah uses. All of the other variables are dependent on other factor and processes, but Sarah controls the amount of nitrogen that she uses for each plant.