How can fish farming still deplete ecosystems? A. farmed fish often eat wild caught fish
B. fish farming always occurs in the wild
C. farmed fish always live in self contained units
D. farmed fish can be fed substainably grown grains​

I believe that the answer is B. Hope this helps!!

Really sorry if I am wrong! :(      

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

c is the correct answer hope this !