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Not enough details here:((
The answer is it then remain preserved over the centuries. Since a layer of the volcanic ash preserve the art and architecture to the residents, the city of Pompeii then provide a snapshot of the Roman art.Hope this would be of help.
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It is a good adaptive function because if Finches didn't have there special shaped/sized beaks they wouldn't be able to eat, and if they couldn't eat they would starve and die. If all of the Finches did die there is a posibilty that alot of insects would take over. (sorry if this is a stupid answer and if you don't use it it's fine im kind of stupid)
The panpipe is the ancestor of the harmonica.