i think its very clear that the "buzz" is coming from a shell. i dont know how it could be taken other way considering the song title and the lines following "it's the buzz" the sound from a shell when u put it to your ear is known to "tell the sounds of the ocean" and i think she is just saying how every thing is connected and how the past is always there even if you are far from that moment in time just like the shell isnt in the ocean anymore yet it can still make the sounds of the ocean.
i think its very clear that the "buzz" is coming from a shell. i dont know how it could be taken other way considering the song title and the lines following "it's the buzz" the sound from a shell when u put it to your ear is known to "tell the sounds of the ocean" and i think she is just saying how every thing is connected and how the past is always there even if you are far from that moment in time just like the shell isnt in the ocean anymore yet it can still make the sounds of the ocean.