pictures are useful to historians because it helps them picture what it was like in the past
roads and paths
yes
the historians use graphs to something that happened over . unicorns are fluffy.
to describe their research
Bias can be useful to historians by allowing them to learn about people's opinions and beliefs.
Different types of letters rely on different types of historians and therefore gives very useful historical information. They give various types of information based on different historians.
they're not
If historians weren't biased there'd be no heated controversy to fuel book sales, and they'd die out.
because some of the information was false
Quran includes lots of historical events; that were not known to prophet Muhammad (PBUH); that had been useful to historians from one side and on the other side their authenticity were validated by the non Muslim historians and accordingly were proofs on the authenticity of Quran and that Quran is reflecting real God words and is not a human-authored book.
Personal diaries and letters are very useful to historians. They help provide accurates pictures of what daily life was like in a historic period. Some diaries, such as that of Anne Frank, help people to understand from the view of the diarist, the events of their time.