GRE Text Completion Question 221
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Source: XDF
Although the feeding activities of whales and walruses give the seafloor of the Bering Shelf a devastated appearance, these activities seem to be actually_____to the area,_____its productivity.
| Blank(i) | Blank(ii) |
|---|---|
| A beneficial | D encumbering |
| B detrimental | E redirecting |
| C superfluous | F enhancing |