The ocean stores carbon from its interactions with the atmosphere, so
the ocean serves as carbon sink for the carbon cycle.
What is Carbon cycle?
This is the process in which carbon atoms travel from the Earth to the
atmosphere and back to the Earth in a repeated manner.
Carbon sink are areas such as oceans in which Carbon is stored as a
result of various biological and physical processes which occur in the
region. This is why Ocean serving as carbon sink is the most appropriate
choice.
Read more about Carbon sink here https://brainly.com/question/7150744
