Why does a struck tuning found louder when its handle is held against a table?

A struck tuning fork sounds louder when its handle is held against a table because the table acts as a resonating surface. When the fork vibrates, it transfers its sound waves to the table, which amplifies the sound by increasing the surface area that vibrates and produces sound waves. This resonance enhances the overall volume and richness of the sound, making it more audible compared to when it is struck in free air.