Which of the following was an initial benefit of electrical systems?

The initial benefit of electrical systems significantly impacted outdoor lighting. The advent of electric lighting transformed public and private spaces by allowing for extended hours of activity and improving safety. Prior to the introduction of electrical systems, illumination relied on gas or oil, which were less efficient and often created fire hazards. The ability to install electric lights in streets, homes, and businesses enhanced visibility, making urban areas safer and more functional after dark. This change not only promoted social activities during evenings but also contributed to the overall modernization of cities.

While the other options also present valid benefits that emerged from the advancement of electrical systems, such as reduced manual labor and improvements in telecommunications, the immediate and noticeable effect of electric lighting on societal dynamics makes it a standout initial advantage.