Musicians use a time signature to specify the number of beats in a measure (also called a bar).
Answer:
Paleolithic (or Old Stone Age), Mesolithic (or Middle Stone Age), and Neolithic (or New Stone Age)
Explanation:
This era is marked by the use of tools by our early human ancestors. It was evoloved around 300,000 B.C. and became transformed into a culture of hunting and gathering to farming and food production. During this era, early humans shared the planet with a number of now-extinct hominin relatives, including Neanderthals and Denisovans.
The answer is Philadelphia Sound
