Various methods of aquaculture can be used to grow species of marine fish. consider the figure below, which shows one way that an aquaculture system can be set up. explain whether this represents an open or closed system and one benefit of using this type of system.

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igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.