From my my experience this usually differs depending on the type of book it is, but I think the best choice is either A, to help the reader understand new concepts, or C., It allows the reader to focus on key ideas and information during the reading. I'd pick C though, since it's more in depth and makes more sense.
B. doesn't make that much sense unless the book is an argumentative or a persuasive book.
D. only applies to personal narratives. Nobody can understand a writer's personal experiences and attitudes otherwise.
Answer:
Sir, Through this letter you have to inform that I am getting very high electricity bill for last 2 months which is about Rs. 20000 is more. It appears that there has been an unexpected increase in the bill, because I know that our electricity consumption is not so high.
Explanation:
Answer:
transportation systems improved
Explanation:
