What does "underground distribution" in electrical systems refer to?

"Underground distribution" in electrical systems specifically refers to power distribution cables that are buried underground. This method is commonly used to enhance reliability and safety in power distribution networks by protecting cables from environmental factors such as weather, falling tree branches, and accidental damage.

This approach also reduces visual clutter in urban settings and minimizes the risk of accidents associated with overhead lines. The underground cables are designed to withstand environmental stressors and are often insulated to prevent damage and ensure efficient power delivery.

The other options describe different concepts. For instance, power lines constructed above ground pertain to traditional overhead systems, while elevated transmission lines reflect a different distribution strategy that involves towers. The notion of obsolescence does not apply here, as underground distribution remains a critical and effective method for modern electrical infrastructure.