The zipper ripples because the teeth of the zipper are not perfectly aligned or because there is tension in the fabric surrounding the zipper. When the zipper is pulled up or down, the teeth may not interlock smoothly, causing a ripple effect. Additionally, if the fabric is too tight or stretched around the zipper, it can create a rippling effect as the zipper is moved. **

Yes, the zipper has come off. It will need to be repaired or replaced in order to fix the issue. It is important to address this problem promptly to ensure the item can still be used effectively. **

The shoes that have a zipper are typically ankle boots, high-top sneakers, or some types of sandals. The zipper is used as a closure mechanism to make it easier to put on and take off the shoes. It is a popular feature in many modern shoe designs for both practical and aesthetic reasons. **

Yes, the zipper has fallen off. It will need to be repaired or replaced in order to use it again. **

When choosing a zipper, consider the type of fabric and the weight of the item you are working with. For lightweight fabrics like silk or chiffon, a delicate invisible zipper would be a good choice. For heavier fabrics like denim or canvas, a sturdy metal or plastic zipper would be more suitable. Also, consider the length and color of the zipper to ensure it complements your project. **

The zipper is closed by pulling the slider or pull tab upwards, which brings the interlocking teeth or coils together, thus closing the zipper. The slider moves along the tracks of the zipper, engaging the teeth or coils to secure the closure. Once the slider reaches the top of the zipper, it stops and the zipper is fully closed. **

Yes, the zipper has gotten stuck. It seems to be caught on some fabric or the teeth are misaligned. I will try to gently wiggle and maneuver the zipper to see if I can free it. If that doesn't work, I may need to use some lubricant or take it to a professional to fix. **

The zipper was invented in 1893 by Whitcomb L. Judson, an American inventor from Chicago. He initially called it the "clasp locker" and it was first used on a type of rubber boots. However, it wasn't until the early 20th century that the modern zipper as we know it today was developed by Gideon Sundback, a Swedish-American engineer. His design improved the functionality and reliability of the zipper, leading to its widespread use in clothing and other products. **