Final answer:
The best explanation for what happens during energy transfer between objects and particles is the spontaneous transfer of energy from a higher temperature system to a lower temperature system, known as heat transfer, until both reach the same temperature, causing a temperature change.
Step-by-step explanation:
The statement that best explains what happens when energy transfer occurs between objects and particles is: Energy is transferred spontaneously from a higher temperature system to a lower temperature system. This process is referred to as heat transfer. Heat, being a form of energy, moves from an object or substance at a higher temperature to one at a lower temperature due to the temperature difference. This continues until thermal equilibrium is reached, meaning both objects are at the same temperature. The temperature change in an object occurs as a result of the heat transfer, which can be quantitatively described by the equation Q = mcΔT, where 'm' is the mass and 'c' is the specific heat of the substance.