Answer:
D. would be the best answer
Explanation:
Although they mainly found evidence through fossils, they also found this evidence with the occurrence of earthquakes and volcanic eruptions.
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Balanced forces are forces that are equal in force but opposite sides. Mary would need to push on the opposite side of Trey with the same force of 30N. (I provided a photo to visualize)
The integumentary system (skin) has been called a membrane and an organ but, it is generally considered a system because it has organs that work together as a system. It is sometimes considered an organ because it contains several types of tissues and a membrane and it covers the body.
It is called peristalsis movement.