When Karel encounters a wall, which command can it use to change its direction?

When Karel encounters a wall, the command that allows it to change its direction is to use the turnLeft() command. This command enables Karel to pivot 90 degrees to its left, effectively redirecting its path and providing a way to navigate around obstacles like walls.

In the context of Karel programming, when Karel interacts with a wall, it cannot move forward, so turning left gives it an alternative direction to attempt movement, depending on the position of the wall and the configuration of the surrounding area.

The other commands do not serve the same function in this scenario. The turnRight() and turnAround() commands can also change direction, but they do not consistently provide an immediate leftward redirection which can be helpful when facing walls. The move() command would simply attempt to push Karel forward, potentially leading to a collision with the wall instead of helping Karel navigate around it. Thus, using turnLeft() is a strategic response to encountering a wall, enabling Karel to continue its task effectively.