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Rotation is the motion that causes us to see phases
Answer:
Polymer
Explanation:
polymer: A relatively large molecule consisting of a chain or network of many identical or similar monomers chemically bonded to each other. monomer: A relatively small molecule that can form covalent bonds with other molecules of this type to form a polymer.
The Cretaceous Period was the last and longest period of the Mesozoic Era. It lasted 79 million years.