<span>The Chemistry. When carbon dioxide (CO2) is absorbed by seawater, chemical reactions occur that reduce seawater pH, carbonate ion concentration, and saturation states of biologically important calcium carbonate minerals. These chemical reactions are termed "ocean acidification" or "OA" for short.</span>
The answer is B. an organ.
Brainliest answer would be greatly appreciated.
Answer A. If the tectonic plates continually move then they change earth’s crust constantly.
