How does the behaviour of s-waves and p-waves indicate the properties of the earth?

The question to your answer is illinois amigo

Intrusion is the best answer and the newest form.

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Ithink the answer is ,temperature,pressure, and chemical changethey are identified by texture,streak,and locationthere are three ways that metamorphic rocks can form contact, regional,and dynamic metamorphism good luck, all this came right outta of the book