Protective barriers are structures or materials designed to shield individuals, communities, or environments from potential harm. These barriers can take various forms, such as physical walls, fences, or natural features like mountains and rivers. They serve to prevent accidents, reduce exposure to hazards, and enhance safety in different contexts. In addition to physical barriers, there are also protective measures in health and safety, such as vaccines and masks. These measures help to guard against diseases and infections, creating a safer environment for everyone. Overall, protective barriers play a crucial role in safeguarding lives and promoting well-being.