I believe it's copper and gold :)
D. communists that’s the answer to your question
Answer:
The types of energy used in the United States have changed over time. The change has been driven by advances in technology, energy resource discoveries, energy prices, social pressures and other factors. The only constant is that the amount of energy used has increased steadily over time.
Explanation:
hope this helps:)
Music is created on what stage the culture is in. In the 60's and 70's you never herd a song about the things you hear today
