Final answer:
The heating of a metal coat hanger in a campfire is an example of conduction, a process where heat is transferred through direct contact of particles and spreads throughout the material.
Step-by-step explanation:
Holding a metal coat hanger in a campfire and the hanger getting hot is an example of conduction. This process of heat transfer occurs through the direct contact of particles, where energetic motion from one part of the hanger spreads to cooler regions, eventually heating the entire object. Similar to how a steak cooks on a hot skillet, the metal coat hanger heats up as the particles near the flame vibrate and transfer energy through successive collisions to the rest of the hanger.