They needed to find more land for more opportunities for factories and trading. To spread their civilization to other people
I'm not sure but extract is a synonym of abstract
Answer:
John Hamilton Gray served in the British military before entering Prince Edward Island politics.
New evidence is discovered & Oversights and errors are corrected
Thats what i personally think because new opinions have to be backed with evidence, while if a piece of evidence is lost or stolen, it doesn't change the arguments because even though it is lost or stolen, there ought to be copies of the original object, but im not sure about new technology being applied to evidence, but it can go either or, its a 50/50 because new technology can enhance historical discoveries, or find new ones, but applying new technology as evidence has to be backed up with facts as to why it should be applied