Final answer:
The primary means by which heat is transferred through fluids is convection currents.
Step-by-step explanation:
The primary means by which heat is transferred through fluids is convection currents. Convection is the transfer of heat through the movement of particles in a fluid. When a fluid is heated, the particles closest to the heat source become less dense and rise, while the cooler particles sink. This creates a circular motion known as convection currents, which transfer heat throughout the fluid.
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