Why is this the answer?

The answer is shoes because this clever riddle uses fun word pictures to describe an object you rely on for almost every adventure, big or small. This puzzle has two main parts, and both point right to what you wear on your feet every single day. Let us look closely at the first clue: "In buckles or lace, they help set the pace." This is talking about how you secure your footwear. Some shoes have long strings, which are the laces you tie into a bow to keep them snugly on your feet. Other types might have straps with little metal pieces called buckles, or even hook-and-loop fasteners. All of these things, whether it is lace or buckles, keep the shoe attached to you. When the riddle says they "help set the pace," it means your shoes are there for every single step of your journey. They help you move at your speed, whether you are taking slow, steady steps on a nature walk or running with all your might in a relay race. They provide the grip and comfort you need to travel. The second part is a very clever clue: "The farther you go, the thinner they grow." This is the secret to solving the riddle! Think about your favorite pair of sneakers, especially the ones you have had for a long time. The bottom of the shoe, called the sole, is very thick when the shoe is new. But what happens after months of running, jumping, and playing outside? Every step causes the rubber on the bottom to rub against the ground. The material slowly but surely wears away. The more distance you cover, the "thinner" that sole gets, especially around the heel and the ball of your foot. You are literally wearing them down by going on so many amazing journeys. This wearing down is the shoe "growing thinner." It shows how much work your faithful shoes have done to help you explore the world. So, from the laces that keep them on to the soles that get thinner from use, the answer is clearly shoes.