In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Let me give you an example: Article: There are a lot of public libraries in Britain. These libraries have more than one hundred and fifteen million books, not including those libraries of public schools. Public libraries not only lend books, music records but also help children, patients in hospitals and others to get special play readings, film shows and so on. The first public libraries were founded in about the year 1850. Today's public libraries usually have a reading-room, a lending room and a reference room. The greatest and most famous library in Britain is that of the British Library in London. It was founded in 1973 and has over 10, 000, 000 books. It has nearly every magazine, newspaper and book published in Britain and other parts across the world.
Answer: 10,000,000 or less.
The answer to this example can be: How many books are there in the British Library?
Here is why: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

OK. solve this:
Article: By the age of almost four, Elijah Edney has never had a haircut in his life. But now he can ' t wait to visit the barber's - for two reasons: losing his two - foot - long golden hair will mean that strangers stop mistaking him for a girl; the hair will be donated to charity to provide a wig for a child with cancer. Mrs. Edney, who works in a restaurant, says, "Elijah has always had beautiful hair, so I let him grow it as he w8nted. It' s like silk. But now it is at a stage where people mistake him for a girl and he wants it cut into a boy's haircut. " Mrs. Edney and her husband want to collect enough money-PS350-to process Elijah's hair for a sick child. She says, "I couldn't bear to see all Elijah's beautiful hair go to waste and my mum mentioned charities that have human hair made into wigs. " Mrs. Edney says, "If we can raise the amount we want, it will mean a family will not have to pay for the wig and can receive it for free. When you've got children yourself, you hope that if they lost their hair someone would do the same for them by donating their hair. " The two-foot-long hair will be donated to the Little Princess Trust to make a wig for children suffering cancer. Elijah keeps telling people he is giving his hair to poor princesses and he is so excited about it. A spokesman for the Little Princess Trust says, "We're very grateful to anyone who decides to have their hair cut to donate it to the Little Princess Trust. As a result of hair donations like this, the charity receives real-hair wigs for free to pass on to families whose children have sadly lost their own hair through cancer treatment. "
Answer: Because Elijah has beautiful hair.
Answer:
Why has Mrs. Edney let Elijah's hair grow so long?