What type of margin do mountain building produce mountains composed entirely of preexisting crust material?

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

Although china’s total economic output, measured by gross domestic product (gdp), is third largest in the world, it is considered a developing nation. what is most likely the most important factor for this designation? a. china’s government spends money on things that do not benefit human development. b. china has a large population, so its gdp per person is only modest. c. china has a strong economy but weak literacy and school attendance rates. d. china’s high rates of disease offset the country's economic gains.

How does lithosphere behave as a system ?