Answer:
Explanation: When carbon dioxide (CO2) is released into the atmosphere, some of it dissolves in the ocean's surface waters. In seawater, CO2 reacts with water molecules and forms carbonic acid, which lowers the pH of the water and makes it more acidic. This increase in acidity is known as ocean acidification. The excess carbonic acid also reduces the availability of carbonate ions in seawater, which are essential building blocks for marine organisms to form their shells and skeletons. As a result, ocean acidification can have negative impacts on the growth and survival of many marine species, including corals, mollusks, and plankton, which can ultimately affect the entire ocean food chain.