Dynamic structures refer to systems or frameworks that can change and adapt over time. These structures are often used in various fields, such as engineering, architecture, and computer science, to accommodate varying conditions or requirements. For example, a dynamic bridge can adjust its shape or tension based on the weight of vehicles crossing it, ensuring safety and efficiency. In computer science, dynamic structures often refer to data structures that can grow or shrink as needed, such as linked lists or dynamic arrays. These structures allow for efficient memory usage and flexibility, making them essential for applications that require frequent data modifications.