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22 June, 14:12

An ocean trench:

a. marks the upwelling of mantle material

b. is the site of submarine volcanoes

c. occurs where a plate is moving down

d. started the breakup of the single southern continent

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Answers (2)
  1. 22 June, 17:16
    0
    It ocures when it pushes it down so it will be c
  2. 22 June, 18:01
    0
    I think the answer is C ...
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