Heat flows from a warmer object to a colder object. (Option A).
What is heat flow?
Heat flow is the transfer of thermal energy between two systems or objects that are at different temperatures. Heat always moves from regions of higher temperature to regions of lower temperature in an attempt to equalize the temperature difference.
The direction of heat flow is governed by the principle of the second law of thermodynamics, which states that heat energy tends to spontaneously flow from regions of higher temperature to regions of lower temperature until thermal equilibrium is reached.
The complete question is below:
Which best describes how heat flows? A. Heat flows from a warmer object to a colder object. B. Heat flows in any direction. C. Heat flows from a colder object to a warmer object. D. All objects transfer to their heat to all other objects.