What is a key feature of the 'start()' function in Karel programming?

The 'start()' function in Karel programming is essential as it initializes Karel's movement and actions. This function serves as the entry point for the program, setting the stage for Karel to perform its designated tasks. When the 'start()' function is invoked, it allows for the setup of any necessary parameters, environment configurations, and the execution of subsequent commands that guide Karel through its programmed activities.

While other options may reference certain actions Karel can perform, they do not capture the overarching purpose of the 'start()' function, which is to set up Karel's environment and to initiate all programmed actions. This means that without the 'start()' function properly defined, Karel would not know what tasks to perform, how to move, or the sequence in which to execute them. Thus, understanding that the 'start()' function lays the foundation for Karel's movements and actions is crucial for effective programming in Karel challenges.