Correct Answer: C
Solution :Plants need water, nutrients present in the soil and sunlight to grow. Good soil means soil containing essential nutrients. Poor soil does not contain essential nutrients. Therefore, plants should be planted in good soil to grow. Also, overcrowding affects the growth of the plants because they will compete for the resources like water, nutrients and sunlight and this will lead to poor growth of plants. Thus, children should keep other factors same except the number of plants grown. In option (d), the amount of soil in both the pots is not same.
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