The answer you want here is Vegetation and climate
hope it helps
Answer:
because your a naughty person
oop (o.o)
On October 29 1929 the stock market crashed causing the great depression. Families lost homes insurance jobs etc.
This historian would be using "research skills" at this stage of the process, since he or she has yet to determine all the facts, and therefore is unable to yet form a thesis.
