I NEED HELP FOR THIS QUESTION IT'S ONLY ONE. I WILL GIVE BRAINLIEST TO THE ONE WHO ANSWERS FIRST The Gastropod is found in multiple rock layers. What does this indicate?

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The special and most important multiple rock layers.

Explanation:

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the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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