D, combination of all the them
Oceanography is is the study of the physical and biological aspects of the ocean, so my assumption is an oceanographer is a person who studies those things.
Answer:
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The main goal of UNESCO is t<span>o end extreme poverty around the world.
UNESCO is an organization based in PAris that stands for </span><span>The United Nations Educational, Scientific and Cultural Organization , and it's aimed to end the world's proverty through the exchange of education, scientifc, and cultural objects from one nations to another in order to make a sense of belonging to grow within nations.</span>