It means: "Will heat be transferred from one place to another, WITHOUT the need to take any special measures?"
Flareon doesn't learn heatwave naturally by level. This move has to be taught to the pokemon by a move tutor. A move tutor can teach this move at any level
if you mean to what way it transfer, always the heat is going to move to the cooler object. The means of heat transfer is conduction.
Thermal energy that can move from one substance to another is called heat. Heat always moves from a warmer substance to a cooler one. An increase in temperature means that heat moves into a substance.
The mechanisms to transfer heat are conduction, convection, and radiation. Heat will naturally flow from hotter to colder objects.
I think you mean "thermodynamics" -- which is the study of heat and how it changes. Literally, thermo means "heat" and dynamics means motion -- so thermodynamics literally means "heat motion." You can't literally see heat move so thermodynamics is really the study of how heat can change into energy and can generate power.
Heat
Convection is heat flow by means of moving matter. It only works in fluids (i.e. liquids and gases). Conduction is heat flow by means of direct physical contact. Radiation is heat flow by means of electromagnetic waves. It can work through a vacuum. Heat always naturally flows from something "hot" to something "cold". This is a form of entropy.
they naturally move left because all the molecules need to reach equilibrium
naturellement means naturally in the sense of nature. bien entendu means naturally in the sense of 'of course'
Yes, that is what "good thermal conductor" means.
no, but it can be if you heat it but naturally it isn't
Heat will naturally flow from a hotter object to a colder object. To make it flow in the opposite direction requires some additional energy input (for example, in a refrigerator).