On a separate sheet of paper write a newspapper article about an animal that returns to the same place every year?

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

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well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."