"Axis" is a noun, and it means "an imaginary line around which a body rotates".
The answer is D. at a distance
The last sentence is an example of a comma splice since 2 independent clauses are connected by only a comma(it needs a coordinating conjunction after the comma or change it to semicolon or period)
it is A. According to google, it says, the metaphorical fall of the Usher family. If we read more, we understand they have all fallen, or died.