What does the 'putTwoBalls()' function achieve in the Double Tennis Balls program?

The 'putTwoBalls()' function is designed to place two balls on the grid. In a program like the Double Tennis Balls program, this function directly contributes to the main goal of the task, which is to ensure that Karel deposits two balls in a specified location. The implementation of this function typically involves executing the appropriate commands sequentially to ensure that Karel first places one ball and then places another ball in the same or adjacent position.

This operation is crucial for tasks where Karel needs to manage multiple objects, like tennis balls, on the grid. By effectively being able to place two balls, it allows for a clear demonstration of Karel's ability to perform repetitive actions and reinforces the concept of functions in programming, encapsulating behavior for reusability. Thus, the choice to indicate that it places two balls on the grid accurately reflects the purpose and functionality of the 'putTwoBalls()' function.