PLEASE HELP I NEED THIS RIGHT AWAY. which statement best describes the role of plate tectonics in changes that occur on Earth?
A. convection currents in the mantle cause mountain ranges to slowly collapse over time.
B. the movement of plates build pressure that is released during an earthquake.
C. the subduction of ocean crust cools the mantle and prevents volcanic eruptions.
D. seafloor spreading causes ocean basins to get smaller in the shower over time. ​

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

Why is the study of demography important to geographers

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.