[单选题]What is the major reason for maple trees’ extinction?
A.The rarity of the new species.
B.A lack of scientific research.
C.Problems with the distribution.
D.The losses of their habitats.

参考答案:D

细节理解题。根据第二段中"The trees are experiencing a vast decline in habitat, due to urban development, timber harvesting, and agricultural expansion.(由于城市发展、木材采伐和农业扩张，这些树木的栖息地正在急剧减少)"以及"And because of climate change, the narrow habitats that support species at the tops of mountains are quickly disappearing. (由于气候变化，山顶上支持物种生存的狭窄栖息地正在迅速消失)"可知，失去栖息地是枫树灭绝的主要原因。故选D。