Question

bill nye: human impact on climate change
paul riccio
multiple - choice question
the increase in temperature of the oceans has lead to a decrease in oxygen levels and...
a decrease in ocean acidity
an increase in ocean acidity
rewatch

Explanation:

When ocean temperatures rise, more carbon dioxide is absorbed by the oceans. Carbon dioxide reacts with water to form carbonic acid ($\ce{CO2 + H2O <=> H2CO3}$), which increases ocean acidity.

Answer:

B. An increase in ocean acidity