What are the 5 tools used by historians to understand past?

Letters, diaries, speeches, and photographs are examples of primary sources. Artifacts such as tools are also primary sources. Other tools that historians use are secondary sources. They are written after a historical event by people who did not see the event.

Explanation:

your answer is 1930's

explanation

this is just around the time the great depression was starting and putting the us ecnomy into ecnomic failure causing the goverment to take a much larger rule to try and pieace it back together

according to the map, most industrialization in europe occurred in the northwest.

the production of coal and lignite deposits was profitable throughout western europe.

the building of railroads transport goods throughout europe.

according to the map, the population trend indicates that more people are moving into cities.

northwest

coal and lignite depostis

railroads

cities