How is carbon dioxide absorbed by the ocean? select all that apply.

fish respiring and releasing carbon dioxide into the water.
plankton on the surface absorb it from the atmosphere for photosynthesis.
mixing occurring at the surface of the ocean with the atmosphere.
chemical waste dumping by industrial plants.

Options (1) and (3)

Explanation:

Carbon dioxide is an important greenhouse gas present in the atmosphere. A small increase in the concentration of CO₂ can lead to an extensive increase in the earth's surface temperature.  

This CO₂ gets mixed up with the ocean and eventually gets absorbed. The marine organism such as fishes, sharks, and sardines undergoes the process of respiration where they utilize the dissolved oxygen and in return gives out the CO₂ into the ocean. In addition to this, the atmosphere is comprised of various gases and above the ocean surface layers, there also is the presence of CO₂ that interacts with the ocean surface waves as the wind blows over the area. Also, due to the higher turbulence of these waves, the CO₂ gets mixes up readily with the ocean water, as a result of which the atmospheric CO₂ is transferred to the ocean.

This is how CO₂ is absorbed by the oceans.

Hence, the correct answers are options (1) and (3).