A or b or c not d you chose
The SunBelt is a region defined by warm climate of the United States. Is not a political example although this region coincide with a very fast growing economy and population for the last decades.
Corect answer is C - a formal example
The answer that is being described above is SPAIN. This is the country that sent explorers so they can take control of the lands in the south and west of Mississippi river because of the gold deposits, as well as farming and ranching. Hope this answers your question.
Rocks are made of minerals. Only a few minerals are rock forming and most rock is made from a combination of the commonest of these such as feldspars, quartz, mica, olivine, calcite, pyroxene and amphiboles.
hope this helped :)