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Why do earthquakes and volcanoes occur at plat
问题详情
Why do earthquakes and volcanoes occur at plate boundaries？
A．Plate boundaries undergo much tension and friction.
B．Temperatures fluctuate greatly at plate boundaries.
C．Earthquakes and volcanoes cause new plates to form.
D．The causes of earthquakes and volcanoes are unknown.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：The professor says Most of the world's earthquakes and volcanoes occur at plate boundaries; ... because plate boundaries are where a great deal of friction and stress occur.(2.2)
