Why is this the answer?

The answer is rainbow because this amazing riddle uses some very clever language to describe one of the prettiest things you can see in the sky. Let us break down the four lines of the puzzle to see how they all point to the rainbow. The first part says, "I have split the one into five." Think about a sunny day right after a rain shower. The sun's light looks white, but it is actually a mix of all the colors you see in the rainbow. The riddle calls the white light the "one." When this sunlight hits tiny raindrops floating in the air, the water separates the single white light into all its beautiful parts, which are the different colors. That is how the "one" light is split into many colors, which is why the rainbow is so colorful. The second clue is, "I am the circle that few will spy." When you stand on the ground, a rainbow always looks like a perfect, colorful arch in the sky, like a big, curved smile. That arch is only half of a full circle. If you were up high in a tall building or an airplane, you might be lucky enough to see the entire rainbow as a complete ring, or circle. Since almost everyone only sees the half-circle from the ground, the riddle tells you that "few will spy" the full circle. The third line, "I am the path that breaks and gives," tells us how the rainbow is made. It is talking about the path of light from the sun. When the sunlight travels into the little raindrops, the light actually bends and changes direction. Scientists call this bending "refraction," but we can think of it as the path of light "breaking." When it breaks, it shows or "gives" us all those bright, beautiful colors that make up the rainbow. Finally, the riddle says, "I am the bow no man may bend." A rainbow is definitely shaped like a giant archer's bow. However, since a rainbow is not a solid object made of wood or plastic, but just light bending through water, you could never actually reach out and grab it or bend it. It is a wonderful, colorful light show that we can only look at, not touch. All these clever clues about colors, circles, bending light, and its arch shape make the rainbow the perfect answer.