Metalworking began a. during the upper paleolithic period. b. with the introductions of bronze, an alloy, or mixture of tin and copper, changed the peoples of europe. c. out of a need for stronger weaponry to used against the increasingly aggressive vikings. d. with, and because of, all of the above circumstances.

Answer : Option B) With the introductions of Bronze, an alloy or mixture of tin and copper, changed the peoples of Europe.

Explanation : The metal working began around 6000 BC. It was discovered as the the process in which working with metals was an important task to create individual parts, assemblies, etc. It was when the copper smelting was very common the use of alloy was discovered and manufactured to use. It changed the lives of people of Europe.

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."

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