Why is segmentation of memory needed?

Segmentation of memory is needed to efficiently manage and utilize a computer's memory resources by dividing it into distinct segments based on logical divisions, such as code, data, and stack. This organization allows for better protection and isolation of processes, thereby enhancing security and stability. Additionally, segmentation facilitates easier allocation and deallocation of memory, optimizing the use of available space by allowing programs to grow and shrink as needed. Overall, it improves the flexibility and usability of memory in a multitasking environment.