Which command allows Karel to turn to the left?

The command "turnLeft();" is the correct choice for allowing Karel to turn to the left. In Karel programming, this specific command is designed to instruct Karel to change its orientation by 90 degrees to the left, which is essential for navigating the grid effectively.

Turning left is a fundamental movement for Karel to avoid obstacles, change direction, or reach a specific goal within the environment. By using "turnLeft();", Karel can adjust its facing direction, enabling it to continue on its path or to perform tasks that require a change in orientation.

Other commands mentioned do not represent the same action of turning left. "turnAround();" would rotate Karel 180 degrees, "goBack();" implies moving backward without changing the direction Karel is facing, and "rotateLeft();" isn't a recognized command in standard Karel programming syntax. Hence, "turnLeft();" specifically fulfills the requirement for turning Karel to the left.