Answer:
Passing through clay beds filters groundwater, purifying out soil, or organic materials, and contaminants to leave behind pure water that fills up aquifers.
Explanation:
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The action potential can jump from node to node along the insulting myelin sheath.
The egg shell would be most representative of the Earth's Mantle or "Crust", the yolk and white would represent the molten metal inside the earths core I assume.
The answer for this question is D
