Answer:
Main character
Explanation:
A main character is central to the story and is typically fully characterized.
Answer: The match is a significant invention that was produced after a historical evolution of kindling fires.
Answer:
The gravitational pull of the two items can be different
I think that's right I'm not fully sure..
Answer:

Explanation:
Whenever we are trying to incorporate a coordinating conjunction to combine two sentences, it is not necessary to use commas.
=> The conjunction itself is used to combine both the sentences so, using a commas is an unnecessary thing!
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