When the heat source is removed from a fluid, convection currents in the fluid will
a. speed up.
b. change direction.
c. eventually stop.
d. continue at the same rate forever.

When a heat source is removed from a fluid, convection current in the fluid will eventually stop because temperature gradient along the fluid is now gone. convection occurs when there is a heat source then part of the fluid will be heated, and as a tendency the hot fluid will flow to the cooler region, while the cooler fluid will flow to the hot region this is why convection current occurs.

The answer is C. eventually stop 
In fluids, when a cold fluid meets joins together with a heated fluid, it creates convection.

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