How are oceans directly affected by increased carbon dioxide concentrations in the atmosphere?

oceans are becoming less acidic.
oceans are becoming less turbid.
oceans are becoming more acidic.
oceans are becoming more turbid.

Oceans are becoming more acidic.

Explanation:

Increased concentrations of carbon dioxide in atmosphere has led to more absorption of the gas by oceanic water. When dissolved in water, carbon dioxide has forms carbonic acid. Hence, increased carbon dioxide concentrations in air is making the oceans more acidic in nature. Increased acidity of oceans would adversely affect the aquatic life.

the answer would be   10%