Why is this the answer?

The answer is tree because this special riddle uses clever word pictures to describe the amazing life of one of nature's biggest and best helpers. This puzzle talks all about the yearly cycle and the invisible work a tree does for the world. Let us look at the first two lines: "Dies half its life. Lives the rest." This is a tricky part because it makes us think about life and death. The riddle is describing the different seasons that a tree goes through every single year. In the winter, especially for trees with broad leaves, they drop all their green color. They can look very bare, stiff, and dormant, almost like they are resting or sleeping, which the riddle calls "dying." But once the spring sun warms the ground, the tree wakes up. Its leaves grow back, and it looks beautiful, green, and full of energy, which is the time it "lives the rest." The tree is a survivor that renews itself every single year. Next, the riddle says, "Dances without music." Think about when you stand outside on a very windy day. When a strong gust of air blows, the high branches of a tree bend and sway back and forth, and the leaves flutter all over the place. The tree moves in such a grand, flowing way that it truly looks like it is dancing a giant, graceful ballet all by itself, without needing a band or a radio playing any tunes. The wind is the tree's silent partner in this amazing performance. Finally, we have, "Breathes without breath." You and I breathe with our noses and lungs to get the air we need, but a tree "breathes" in a much different and quieter way. It takes in a kind of air called carbon dioxide and uses sunlight to make its food. This special process also releases the fresh, clean air called oxygen that every living thing needs to breathe! So, while the tree does not have a human "breath," it is constantly breathing for the whole planet, making it the perfect match for this imaginative riddle.