Red blood cells have a flattened disk shape. This relates to their function as this shape increases the surface area to volume ratio for better gas exchange.
Ocean acidification causes a decrease in the pH concentration of the oceans, mostly arises as a result of the entry of carbon dioxide from the atmosphere.
A fisherman noticing a shellfish's shell being very small and lack the thick hard shell may be due to Ocean acidification (option A).
- Ocean acidification is mainly caused by fossil fuels and leads to a decrease in the water's pH.
- It also causes a reduction in the amount of carbonate, a building block of shells and skeletons in seawater.
- This makes it very difficult for marine organisms, such as shell fish and corals, to form their shells and skeletons, and those with existing shells may begin to dissolve.
Learn more about ocean acidification: brainly.com/question/5426691
