Why does globalization lead to a reduction in prices for goods and services?

I believe the answer is: Increased mobility allows producers to move jobs to lower-cost labor markets

In lower-cost labor markets, the producers could get more output of productions with lower overall salary.
This would lower the cost they need to make a single product, which make them able to sell them on a lower price and still obtain a profit

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.