How does heat flow?

A. Heat flows from all objects to all other objects.

B. Heat flows from a warmer object to a colder object.

C. Heat does not actually flow from one object to another.

When you bring two objects of different temperature together, energy will always be transferred from the hotter to the cooler object. The objects will exchange thermal energy, until thermal equilibrium is reached, i. e. until their temperatures are equal. We say that heat flows from the hotter to the cooler object.