Please explain the difference between Migration and Circulation.​

Answer feldspar,quartz,mica and amphibole;

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.

Nswer iceland is one of the most active volcanic regions on earth