Final answer:
Photosynthesis is not a root function in plants.
Step-by-step explanation:
Out of the given options, photosynthesis is not a root function in plants. Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into glucose (carbohydrate) and oxygen. It takes place in the chloroplasts of plant cells, primarily in the leaves, not in the roots.
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