In the Lay Row of Tennis Balls function, what does Karel do while the front is clear?

In the Lay Row of Tennis Balls function, Karel puts and moves balls while the front is clear. This means that Karel will continue to perform the actions of placing a tennis ball on the current position and then moving forward until it encounters an obstacle, such as a wall or another object. This behavior aligns with Karel's programming to create a row of tennis balls, where it systematically deposits a ball in a straight line.

The chosen answer emphasizes Karel's task of laying out balls, which is central to the function's overall purpose. As Karel moves forward and places a ball, it effectively creates a visual row on the ground. This action continues until Karel is prevented from moving forward by an obstruction, showcasing Karel's programmed logic to fill the available space with tennis balls.

Other options do not accurately represent Karel's behavior in this context. Karel does not stop moving or count balls while moving forward, nor does it turn left as part of laying out the row; the primary function during this operation is to keep placing the balls as long as it can advance.