The concept of thermal transfer allows to find that the correct answer is:
Thermal conduction of bodies is the process by which energy is transferred from bodies with more energy (Temperature) to bodies with lower temperature
There are three main transfer mechanisms
In this case, the whale is initially in the Florida water, so the temperature difference between the whale and the water is small, so the thermal transfer is also small.
When the whale is in the Canadian waters that are very cold, the temperature difference increases, consequently the thermal transfer also increases, in this case the transfer is by conduction and convection.
In conclusion using the concept of thermal transfer we can find that the correct answer is:
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