Question

why are three small bones of ear ossicles are advantageous over one single bone?​

Answer 1

The ossicles give the eardrum a mechanical advantage via lever action and a reduction in the area of force distribution; the resulting vibrations are stronger but move less far. This allows more efficient coupling than if the sound waves were transmitted directly from the outer ear to the oval window

Answer 2

Answer:

Three small bones of the ear ossicles are advantages as compared to one single bone because they amplifier the sound waves.