Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.
What is Conduction ?
Heat conduction is a phenomenon that occurs through the interaction of neighbouring atoms and molecules, transferring their energy/heat (partially) to their neighbours.
This is the most significant means of heat transfer within a solid and between solid objects in thermal contact.
Conduction is the transfer of heat between objects that touch each other.
Therefore, Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.
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