Early humans used rocks as tools to make other things as well as to construct buildings. why was it better for them to use rocks than another material such as wood?

Rocks are hard and more brittle than wood, can be used to cut wood too, 

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!

i didn’t understand your question but archipelagos are groups of island hope this