Which of the following would be considered a nonrenewable resource?
sun
wind
lumber
petroleum

Petroleum is considered a nonrenewable resource becuase it took millions of years for it to made and we are currently using it in great amounts, we might soon run out and we would have to wait a million more years for it to come back, who knows, maybe once it runs out, it will mever come back‍♀️

The one that most represents the earths mantle would be the skin since the mantle is the upper part of the earths depths which is just like the skin of an apple.