Why is spanish the official language of 9 of the 13 nations of south america?

Spanish is the official language of 9 out of 13 nations in South America since great majority of people who lived there speak Spanish. This is also because of the influence of the Spaniard colonists way back then. I hope this answer helps.

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!