Shells evolved from ribs. ... Turtles and other shelled creatures use shells like shields to protect themselves from predators, or animals that hunt them. Turtles probably needed a shield on their backs and stomachs because they faced predators in the ocean from both above and below.
Answer:
It is probably D I am not for sure tho good luck though on it!!!
Explanation:
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link ......http://www.englishgrammar.org/noun-phrase-prepositional-phrase/
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