What does the 'putBallsInRow' function achieve?

The function 'putBallsInRow' specifically instructs Karel to place a designated number of balls in a straight line on the grid. This is achieved by executing a sequence of commands that ensures Karel drops a ball at each step for the specified number of times, which in this case is four. The aim of the function is to create an orderly arrangement of balls in one continuous row, rather than stacking them vertically, scattering them randomly, or moving without dropping any balls. This linear placement is crucial for tasks that require a predictable setup, allowing Karel to perform subsequent actions with the arranged balls effectively. Thus, the understanding that Karel places four balls in a row reflects the core functionality of the 'putBallsInRow' command.