What units are used for the barometric pressure of this map

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

What is the reason for the “scramble for africa”?

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )