In the ocean, there are areas where there are very few living things. ____________ is the term that describes when this happens to a natural area.
Desertification??
no and no
Aquaculture???
Ehe is the right one hope you didn't listen to Lello as aquaculture is fish farming
Since this is not my area of expertise, I searched Google under the key words "ocean area with few living things" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=ocean+area+with+few+living+things&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.