Which of the following substances, by providing strength, allows sclerenchyma cells to provide support and play a role analogous to that of an animal's skeleton?

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Lignin is a complex polymer that provides strength and rigidity to sclerenchyma cells, allowing them to provide support and play a role similar to that of an animal's skeleton. Sucrose and starch are carbohydrates that are used for energy storage, while chlorophyll is a pigment used for photosynthesis. None of these substances have the strength-giving properties required for structural support.

Which of the Following Substances, by Providing Strength, Allows Sclerenchyma