Answer:
A fundamental concept of thermodynamics is that heat will flow from where it is hot to where it is cool. Another way to say this is that heat moves from where it's hot to where it's not. This is always the case, and is the driving force behind the flow or movement of thermal energy.
Something that needs to be understood is that from a thermodynamic perspective, heat is only heat when the energy is in transit. By analogy, rain is only rain when it is falling. Before it falls, it is a cloud, after it lands, it is a puddle or a river or a lake etc. A hot object does not have "a lot of heat" nor is it correct to say that it is "high heat" - it has a lot of internal energy. Changes in the internal energy of an object are manifest as changes in temperature. Heat will flow between a high temperature and a low temperature so it could be said (informally - and incorrectly) that heat flows from "high heat' to "low heat" if you define high heat as high temperature and low heat as low temperature.