The three types of stress that act on earth's rocks are compression, tension, and a. shear. b. tephra. c. strain. d. shale.

The correct answer to the question above would be (a.) shear. The three types of stress that act on Earth's rocks are compression, tension, and shear.The Earth's crust is broken into several parts which are called plates. When these plates are being pulled or pushed together, the Earth's stress now occurs. 

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