What is the primary cause of ocean acidification? Oil spills, plastics and trash Excess carbon dioxide absorption Overfishing

## Step 1<br />Ocean acidification is a process that occurs when carbon dioxide (CO2) is absorbed by seawater. This absorption of CO2 leads to a chemical reaction that reduces the pH of the seawater, making it more acidic.<br /><br />## Step 2<br />The primary cause of ocean acidification is the absorption of excess carbon dioxide from the atmosphere. This is due to the fact that the oceans act as a significant carbon sink, absorbing a large amount of CO2.<br /><br />## Step 3<br />While oil spills, plastics, and trash can have severe impacts on marine life and ecosystems, they do not contribute to the acidification of the ocean.<br /><br />## Step 4<br />Overfishing, which involves the excessive removal of certain species from the ocean, can disrupt the balance of the ecosystem. However, it does not contribute to the acidification of the ocean.