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Part B. A North American grassland is usually more productive when it contains diverse plant communities. Which statement best explains how biodiversity contributes to the sustainability of this ecosystem?
A.

Grasslands with a single dominant plant species tend to recover quickly after a fire.
B
.

Grasslands with low biodiversity show more consistent productivity in all weather conditions.
C.

Grasslands with many plant species maintain soil quality and recover faster after drought
D.

Grasslands with few plant species attract a greater variety of animal species.

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Answered by GPT-5 mini AI
C.

Diverse plant communities improve resource use (different root depths and nutrient needs), support soil organisms, and increase resilience, so grasslands with many species maintain soil quality and recover faster after drought.