Why is this the answer?

The answer is book because this clever riddle uses fun word pictures to describe something you hold in your hands every time you read a wonderful story. It is a puzzle that describes all the parts of a book using words that make you think of a person or a living thing. Let us look at the first clue: "My life is often a volume of grief, your help is needed to turn a new leaf." A "volume" is just a fancy word for a book. The "grief" part is a little tricky; it just means the book might have a sad or serious story written inside. The most important clue here is "turn a new leaf." When you are reading, you physically "turn a leaf," which is what we call a page, to keep going. When you turn a page, you get to see what happens next in the story. The next part says, "Stiff is my spine and my body is pale." Your body has a spine that helps you stand up straight, and a book has a spine too. The book's spine is the hard edge that holds all the pages together so they do not fall out. This spine keeps the book stiff and strong. A book's "body" is made up of all its pages, which are usually a very light, pale white color, ready for the words and pictures. Finally, the riddle says, "But I'm always ready to tell a tale." No matter if the book has been on the shelf for a long time or if it is brand new, it is always waiting to be opened so it can share its tale, or story, with you. A book is a quiet, friendly storyteller that needs you to do the reading so its tale can finally come to life. All of these clever clues point perfectly to a book.