The material that has ridges is corrugated cardboard. Corrugated cardboard is made up of a fluted corrugated sheet sandwiched between two flat linerboards. These flutes create the ridges in the material, providing strength and rigidity to the cardboard. The ridges also help to absorb shock and protect the contents of the packaging. **

Eye ridges, also known as supraorbital ridges or brow ridges, are bony prominences located above the eye sockets. They are a feature of the human skull and are more prominent in some individuals than in others. Eye ridges serve as attachment points for the muscles that control eyebrow movement and help protect the eyes from impacts and injuries. In some non-human primates, such as gorillas and orangutans, eye ridges are much more pronounced and serve as a form of sexual dimorphism. **

Yes, fingernails can develop ridges that may appear strange or unusual. These ridges can be caused by a variety of factors, including aging, nutritional deficiencies, certain medical conditions, or trauma to the nail. While some ridges may be harmless, others may indicate an underlying health issue. It's important to pay attention to changes in the appearance of your fingernails and consult a healthcare professional if you have concerns about the ridges. **

Shells have ridges for a variety of reasons. One main reason is for structural support, as the ridges help to strengthen the shell and protect the soft-bodied animal inside. Additionally, the ridges can also help with camouflage, by breaking up the outline of the shell and making it harder for predators to spot. The ridges may also aid in the shell's growth and development, providing a framework for the deposition of new shell material. **

Pants with ridges are called "corduroy pants." Corduroy is a fabric that has ridges or "wales" running vertically down the fabric, creating a textured and ribbed appearance. These pants are popular for their durability, warmth, and unique texture, making them a stylish and practical choice for both casual and formal wear. **

Seamounts are underwater mountains that rise from the ocean floor but do not reach the water's surface. They are often formed by volcanic activity and can be found in all of the world's oceans. Mid-ocean ridges, on the other hand, are underwater mountain ranges that form at the boundaries of tectonic plates. They are characterized by a series of parallel mountain chains and are the site of intense volcanic and seismic activity. Both seamounts and mid-ocean ridges play important roles in the geology and ecology of the ocean floor. **

Papillary ridges, also known as fingerprints, serve several functions. They improve our sense of touch by increasing friction and providing a better grip. They also help to enhance our dexterity and ability to manipulate objects. Additionally, papillary ridges are unique to each individual and are used for identification purposes in forensic science and law enforcement. **

Light ridges on a tire's profile are small raised lines or grooves that run along the surface of the tire. These ridges are typically designed to improve traction and grip on the road, especially in wet or slippery conditions. They help channel water away from the tire's contact patch, reducing the risk of hydroplaning and enhancing overall performance. **