What is the the reason J.k Rowling put the Deathly Hallows in the book?

Hello, JK did a very cool story. I never expected it. It's unpredictable that the hallows are revealed on the last part and there's not a single clue of it. Some where mentioned in part one like the cloak. Then part six, the ring. Xenophilius explained it since he is eccentric and an expert on such things. The hallows was believed to be a myth. And who else can better explain it than Luna's dad.

Indeed, i asked this question when i first read the book and said to myself maybe J.K Rowling just want to make the story even more longer for the last part and even much more story in it. There was really no connection at all, it made me think again while watching the movie. She could have planned the whole story already but why add the deathly hallows when the whole last book could have focused on the horcruxes and the end of the dark lord. And i think it was better if the Weasleys were the ones who should have told Harry about the Deathly hallows, they have been with Harry the whole 6 books. Well, it's her story and her book, we can't argue with what things she wants to put in her book..heheh. I still love Rowling's imaginations and love the 7 books of Harry Potter.

My 8-year-old asked a similar question--what is the connection between the Horcruxes and the Deathly Hallows, and why did she put them both in the same book? I agreed with him that there is no connection between the two concepts or story lines. I think she probably should have written another book for the Hallows, but since she was determined to finish the series at Book 7, she threw them in with the Horcrux story at the last minute. I think the idea was that Dumbledore was trying to keep things from Harry because he didn't want to "frighten" or "distress" him too much with the whole truth, but I don't know why Lovegood all of a sudden became important enough to deliver this important message. What do you think?

I am rather confused with your question because every element that the author placed in his or her book is essential for the better outcome or predicament of the whole plot itself.... I jsut want to clarify.. are you not satisfied with the story? have your even finished reading the whole 7 series of the book?....