The layer of granitic, sedimentary and metamorphic rocks which form the continents and the areas of shallow seabed close to their shores, known as continental shelves.
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I looked for a picture of what you were talking about and I think I found the answer
Explanation:
If this is the picture then I think its the first choice
<span>A: The proportions of a population that are at different age levels make up the population’s age structure. </span>
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I believe the answer is D for the top one
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A shark's skeleton is made of cartilage , a type of strong but flexible tissue .Most other fish are covered in smooth , flat scales . A shark is covered in sharp , toothlike scales called denticles . Most other fish have flaps over their gills.
Explanation:
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