Erin conducts an experiment to determine whether or not the amount of sunlight a plant receives affects its fruit output. she uses one plant in her experiment. how can erin improve her experiment design?

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Erin must add more plants in her experiment, each one subjected to a different sunlight treatment. For example, one could be placed directly under the heat of the sun, from a shade, at night, and other varying environments to see clearly the effect of amount of sunlight to the plant's fruit output.

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