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Question generated: Which environmental stimulus causes leaves on certain trees to change color in autumn?

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Question generated: An object's hardness, taste, and texture are examples of

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Question generated: Two processes are involved in the formation of a sand dune. Which two processes best describe how a sand dune forms?

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A class planted trees and shrubs in an empty dirt lot beside the school. The roots of the plants can help protect the soil. The soil is most likely being protected from what?