If the motion of particles is decreasing, is heat flowing into or out of the substance? also, explain why

If particle motion is slowing, the particles are losing energy, which means that heat is flowing out of the substance. This also means that it is transferring its energy to another substance which has less energy than the first object. Heat is directly correlated to energy, which is related to the particles' movement. If the particles are slowing, heat is leaving the object.