<span>Thinking of the layers of the earths crust, it would be expected that the mantle is rich in minerals that contain heavy metals such as iron and nickel.</span>
The term pharynx may also be used to describe a differentialed portion of the invertebrate.
"The density of a substance determines how much light is refracted"
Hope this helps :)
I think its matter
hope that helps
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I believe the answer is B.
