Answer
See the explanation
Work Step by Step
The number of tiles out of place is not as good a heuristic as the one used in Section 11.3 because it does not provide an accurate estimate of the distance to the goal state. The number of tiles out of place only considers individual tiles and does not take into account the actual distance each tile needs to move to reach its goal position. In contrast, the heuristic used in Section 11.3, such as the Manhattan distance, considers the actual distance that each tile needs to move to reach its goal position, providing a more accurate estimate of the total cost to reach the goal state. Therefore, the heuristic used in Section 11.3 is more informed and leads to more efficient search algorithms.
