Answer :
Final answer:
The Greeks invented the hydraulis around 250 B.C., an early version of the organ that used water to create sound.
Explanation:
Greeks invented the hydraulis around 250 B.C. This instrument, also known as the water organ, used water to create air pressure that produced sound through pipes. The hydraulis was a precursor to modern-day organs and was utilized in various festivities and ceremonies in ancient Greece.
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