Question

coral reefs are bleaching and some organisms with shells are showing signs that they are being dissolved by the sea water. which factor is causing this negative impact? (1 point)

○ excess dissolved oxygen

○ decreased co2 levels

○ increasing ph

○ ocean acidification

Explanation:

Ocean acidification occurs due to increased CO₂ absorption by seawater, lowering pH. This harms coral reefs (bleaching) and shell - forming organisms (dissolving shells). Excess dissolved oxygen is not the cause. Decreased CO₂ levels would not lead to these issues. Increasing pH would mean less acidity, contrary to the problem's context. Ocean acidification directly explains the described negative impacts.

Answer:

ocean acidification