Which of the following best describes the effect of increased atmospheric carbon dioxide on marine organisms?

Question: Which of the following best describes the effect of increased atmospheric carbon dioxide on marine organisms? 

A). Ocean acidification

B). Water pollution

C). Air pollution

D).adultration in water

The correct answer is:

A). Ocean acidification

Increased atmospheric carbon dioxide (CO2) has a significant effect on marine organisms through a process known as ocean acidification. When CO2 dissolves in seawater, it undergoes a series of chemical reactions that lead to a decrease in pH, making the water more acidic. This shift towards acidity is harmful to many marine organisms, particularly those that rely on calcium carbonate to build their shells or skeletons, such as coral reefs, shellfish, and some plankton species.

The increased acidity interferes with the ability of these organisms to form and maintain their calcium carbonate structures, making them more vulnerable to dissolution and erosion. This can result in weakened shells, decreased growth rates, and increased mortality rates for these organisms. Additionally, ocean acidification can disrupt marine food chains and ecosystems, as many species depend on those affected organisms for food or habitat.

It's important to note that while ocean acidification is primarily driven by increased atmospheric CO2, other factors like pollution and nutrient runoff can exacerbate its effects on marine organisms. However, water pollution, air pollution, and adulteration in water are separate issues and not directly caused by increased atmospheric carbon dioxide.