A scientist is testing whether light color affects plant
growth. She places three groups of plants in boxes, each
with only one color of light: red, blue, or green. She places
a fourth group of plants in natural light. Each day she
measures the plants and records their growth.
What is the independent variable in this experiment?
A. The type of plants she used
B. The growth of the plants
C. The plants in natural light
D. The color of light the plants received



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