Why did the author include this description?
A.

to explain how a star produces light
B. to explain how light travels
C. to explain how cats see in the dark
D. to explain how fog forms

Answer the question find a book and find the answer to this question

Which is not among the style choices a writer would use, if he or she is trying to establish a formal writing style/

1. in which sentence is the underlined portion a predicate nominative? for astronauts, going into space to repair orbiting equipment becomes a challenge. for astronauts, going into space to repair orbiting equipment becomes tricky. for astronauts, going into space to repair orbiting equipment becomes challenging. for astronauts, going into space to repair orbiting equipment becomes frequent.