Why is the installation environment important for the durability of electrical insulation?

The installation environment is crucial for the durability of electrical insulation because it significantly affects both the performance and lifespan of the insulation material. Various environmental factors, such as humidity, temperature extremes, exposure to chemicals, and mechanical stresses, can lead to degradation of the insulating properties. For instance, high humidity can cause moisture absorption, which reduces the dielectric strength and can lead to electrical failures.

Additionally, extreme temperatures can result in thermal expansion or contraction, potentially causing physical damage or breakdown of the insulating material over time. Similarly, exposure to chemicals or pollutants can lead to chemical reactions that deteriorate the insulation's structural integrity. All these factors contribute to the insulation's overall ability to perform effectively in its intended application, thus influencing both how well it works and how long it lasts.

Considering these variables highlights why option B correctly emphasizes the importance of the installation environment on insulation durability.