The answer is a since it could have a different meani
Answer:
A bicycle also called a paddle cycle bike or cycle is a human powered moter powered assited paddle driver single track
I would go with Charlie and the chocolate factory. Your readers will lose interest if you write about the Mayans inventing gum or just start giving them random facts that they don’t actually care about
А.It is the subject that is covered in the passage.
A topic of a passage is usually its main theme and is covered in the passage.