What alternative way does Adam Smith suggest to enhance labor efficiency?

The concept of enhancing labor efficiency as suggested by Adam Smith revolves around the idea of specialization and the division of labor. Reducing travel distances between facilities can significantly contribute to increased productivity because it allows workers to spend more time actively engaged in their tasks rather than commuting back and forth. Shorter travel distances lead to less time wasted and can facilitate quicker, more efficient processes. This is aligned with the fundamental economic principle of maximizing output by minimizing input or wasted time.

The other options do not align directly with Smith's principles. Developing new markets for labor, while potentially beneficial in a broad economic sense, does not directly address the efficiency of the labor force on a micro level. Implementing automation may streamline processes, but that concept extends beyond Smith’s focus on human labor and specialization. Limiting working hours impacts productivity in a different way, potentially leading to less output rather than enhancing efficiency. In a nutshell, the approach of minimizing travel distances directly supports a more efficient use of human resources, which Adam Smith emphasized in his economic theories.