The best item that describes the primary cause of global ocean warming is : Increased global temperature from an increase in greenhouse gases in the atmosphere.
What is global warming?
Global warming can be defined as a long-term increase in the Earth's average temperature. It is characterized by a general increase in average temperatures of the Earth, which modifies the weather balances and ecosystems for a long time.
There are many factors that play a role in global warming, but natural factors and human activity plays major role.
Hence, Increased global temperature from an increase in greenhouse gases in the atmosphere is the primary cause of global ocean warming.
Learn more about global warming here : https://brainly.com/question/3553382
