The primary means by which heat is transferred through fluids is convection currents (option D).
What is convection current?
Convection is the transmission of heat in a fluid by the circulation of currents.
Heat can be transferred by different methods depending on the medium. Fluids like gases and liquids transfer heat through the process of convection.
Therefore, the primary means by which heat is transferred through fluids is convection currents.
Learn more about convection at: https://brainly.com/question/16635311
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