Sound waves enter the outer ear and pass into the ear canal where the waves cause the eardrum to vibrate.
Hope this helps you.<3
        
                    
             
        
        
        
What??? Do you have any more info on this question?
 
        
                    
             
        
        
        
Tribrachidium was originally described by Martin Glaessner as a problematic organism, one that is excluded from all known major groups of animals by its tri-radial symmetry. ... Tribrachidium was a soft-bodied benthic organism that temporarily attached (but did not accrete) to the substrate of its habitat (microbial mats).