Allen made a diagram to compare radiation and conduction. which label belongs in the area marked y?

The answer is; must involve temperature difference between substances or objects

Objects that are hotter than their surrounding emit radiation such as infrared light (which is also called heat radiation). Conduction is also a heat transfer methods in objects that allows heat to move from the hotter sytsem to the cooler system until thermal equilibrium is achieved.    

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop