The answer to 'how does garbage disposal work' is that a garbage disposal is an electrical appliance installed under the kitchen sink that grinds up food waste into small pieces so it can be easily flushed down the drain. It has a motor that spins a set of metal impellers or blades to shred the food into a fine slurry that can be washed away by running water.
Garbage disposals help reduce the amount of food waste that goes into landfills by allowing it to be easily disposed of down the drain. They are convenient for quickly getting rid of food scraps, peels, and leftovers. Most disposals have an overload protection feature that will automatically shut off the motor if it becomes jammed or overloaded to prevent damage.