AN example on how history has been changed/ignored would be thanksgiving and how it actually celebrates genocide
What war? Need to know what war or else there are thousands of answers.
Is this like a guidance or a health class? If so the answer is probably responsibility.
The rift valleys. its the continental plates moving apart
I believe that eyewitness are not a reliable source to solve a crime or problem. Those eyewitness play a major role in the investigation meaning that they have a advantage to change minds. Some studies think that people over the age of 50 years old aren't reliable for testimony. Though, some might think that study accusation is absurd, it may be correct in some ways.
Hope I could help! :)