Help me in 71 and 72 please

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asked Jun 4, 2018 196k views

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Ben Von Handorf · Answer 1 · 2018-06-09T16:44:13+0000

71) Seafloor spreading occurs because new material is being added to the asthenosphere

72) Ridges are formed when two continental plates collied.

Your answer is: 71) A ; 72) D

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Help me in 71 and 72 please

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