How can Karel identify its starting position?

Karel identifies its starting position by beginning at a designated starting point in the grid, which is set prior to the execution of any commands. This starting point is predetermined and is essential for Karel to navigate and execute tasks effectively. If Karel were to begin from a random location or use markers, it would lead to unpredictability and inconsistencies in its operations. The use of a fixed starting point ensures that the same sequence of movements and instructions can be reliably executed from the same location each time, allowing for coherent programming and predictable outcomes. Therefore, the concept of a designated starting point is vital for Karel's functioning within the defined programming environment.