Which would you expect to have the greatest porosity a)sandostone b)gneiss c)shale d)quartizite

The map above shows where people live in the united states. areas that are darker blue are areas where people live close together. areas that are lighter colors are places where people live farther apart. as a geographer, if you were to study where people live and why they choose to live in these places, which of the six essential elements of geography would you be using?

The pacific islands that lie along tectonic plates may have volcanic activity are uninhabited may not have agricultural economies are located in the tasman sea

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?