Why is important for historians to create graphs from primary sources ?

It is important for historians to create graphs from primary sources for the purpose of getting the information more clearly and visually so everybody can access the information a can understand it. A primary source is the one that was the product of people who witnessed the event or the incident.

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beowulf is considered an epic poem because it describes the actions of a great warrior.

beowulf is taken into account an epos. in this poem, the main character may be a hero who travels nice distances to prove his strength at not possible odds against supernatural demons and beasts. in the poem, beowulf was a young warrior and he leaves his country to hrothgar, as hrothgar was in a great trouble.