Answer:
How did the event occur, why it occurred
Explanation:
Historians ask the basic questions such as who was involved, what was the cause of the event and where did the event occur. These are called historical questions or historical inquiry. The questions involve what, who and where about the event.
Such questions are complex as sometimes historians study about the interrelationship between two or more phenomenons. To answer various historical questions it is necessary to conduct research.
C terrorist attacked in New York and Washington D.C.
Easy h<span>e freed the serfs.
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It <span>greatly damaged the ecology and agriculture of the American prairies which led to a severe drought. </span>
