It gets polluted from fertilizers or any spilled chemicals. And those chemicals get obsorbed into the ground. And the gravity pushes them deeper in the soil, till it reaches the underground water (or aquifer)
Answer:
-Crest
-Trough
Explanation:
-Crest : A crest point on a wave with the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum.
-Trough: A trough is the opposite of a crest, so the minimum or lowest point in a cycle.
<em>hope it helps :)</em>
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The dodecahedron can be constructed from the repetitive folding of regular pentagons
They are called Ecologist. Ecologists are authority researchers who study environments and evaluate the decent variety, abundance, and conduct of the distinctive life forms inside them. These folks tend to work for government offices, natural trusts, protection foundations and research establishments.
