What's important of earth crust in human being

Which summarizes the relationship between density of an element and its distribution in earth? a. the greater an element’s density, the greater the amount of it found in the crust. b. the denser an elements is, the smaller the amount of it earth core. c. the greater an elements density, the smaller the amount of it’s found in the crust

Which modern technology has not made a great difference in the inuit way of life?

After world war 2, many people moved from the cities to?