The correct answer is: [D]: "receives venous blood from the lower extremity" .
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Colder air masses are temped Polar or Arctic. While warmer air masses are termed Tropical. Continental and Superior air masses are dry while maritime monsoon air masses are moist. Weather fronts separate air ,asses with different density (Temperature and/or Moisture) characteristics.
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This would be called--Visual.
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Archea is the correct answer. :) good luck!
