Answer:
The geosphere contains the elements that make up the Earth's surface.
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Coral reefs are built by coral polyps as they secrete layers of calcium carbonate beneath their bodies. And inside each coral poly lives single-celled algae called zooxanthellae. So basically in simplistic terms, coral polys create coral reefs and algae is in coral polys which also goes into coral reefs when they are made.
<span>Nitrogen has five (5) valence electrons. Nitrogen needs 3 electrons to complete an octet. </span>The answer is three.
