Answer:
volcano
A volcano is most commonly a conical hill or mountain built around a vent that connects with reservoirs of molten rock below the surface of the Earth. The term volcano also refers to the opening or vent through which the molten rock and associated gases are expelled.
Explanation:
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optical telescope (Hubble), X ray telescope ( Chandra) etc.
get around the Earth's atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying.
B.
Explanation:
The phosphorus cycle matters because phosphorus is an essential nutrient for sustaining life on Earth, where it plays a central role in the transfer of energy within organisms, the structure of the genetic material, and in the composition of cell membranes, bones and teeth.