Answer:
answers below ^^
Step-by-step explanation:
1. primary and secondary sources are:
difference: one(primary) is from a person who has first hand been there or experienced it
secondary is information that has been maybe guessed or estimated or passed down from people (it can get twisted sometimes also it really comes from people who weren't there so its secondary info)
similar: they both give pieces of evidence on a topic it can be on any subject
2. if the information was there is reliable source or talked with a person who has experienced it
3. one was original the other was maybe secondary/ traditionally passed down and it could have changed
4. one might be more different then the other and maybe has other info not known about
5. they could have been in different places (ex of a primary source. lets say a man from the British war going against patriots survived and is still living they talked about how it was the patriots fault and lets say a patriot survived and they said how it was the British fault then it could be hard to find out who's fault it was unless we had more sources) (ex of secondary. lets say a man survived and is still alive from the British war on the patriots side and lets say a young man was told by people that it was no ones fault yet the patriot man said it was the British fault (lets say it was) who would you believe the man who was there or a kid who was told by people who where not there when that war happened )
6. the primary and secondary sources are useful because you can compare and contrast them