According to the passage, the lower regions of the Earth's mantle are characterized by

Puma January 13, 2018

Question #2 from last passage

Can you explain why the answer is #2?

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Mehran January 15, 2018

Hi there, thanks for your post, but we are not sure we follow your question. Are you asking why the answer to Question 2 on this passage is (A)? Please clarify, and we will be happy to help.