Question

Carbon from the atmosphere can enter the ocean as part of the carbon cycle. Which process BEST explains how this happens and how marine organisms use that carbon?(1 point)

Carbon dioxide diffuses from the atmosphere into ocean water, where marine plants and algae use it for photosynthesis.

Carbon dioxide dissolves only when fish breathe underwater, and it is stored in their bodies as carbon compounds

Carbon dioxide enters the ocean through diffusion and is broken down directly into glucose molecules without photosynthesis.

Carbon dioxide diffuses into the ocean only during storms, and algae store it as heat energy.

Answer 1

Carbon dioxide diffuses from the atmosphere into ocean water, where marine plants and algae use it for photosynthesis.

Explanation: CO2 dissolves into the surface ocean and is taken up by phytoplankton and macroalgae to make organic carbon (glucose) via photosynthesis, forming the base of the marine food web.