Which of the following describes environmental resistance in system design?

The correct answer centers on adaptation to different operating environments, which is a critical aspect of environmental resistance in system design. Environmental resistance refers to the capability of a system to function effectively despite changes or variations in its external conditions. This could include variations in temperature, humidity, physical surroundings, or any other factors that may affect the system’s performance.

When a system is designed with high environmental resistance, it is expected to adapt to these varying conditions to maintain its effectiveness and reliability. This characteristic is especially important in systems that operate in dynamic or uncertain environments, where the ability to adjust to different factors can significantly affect overall performance and usability.

On the other hand, the other options suggest different focuses that don't accurately reflect the concept of environmental resistance. Ignoring external changes doesn’t align with the need for adaptability; resistance to user requests focuses more on usability and interaction rather than environmental factors; and reduction of operational costs pertains to economic efficiency rather than the system's ability to adapt to environmental conditions. Each of these options highlights different aspects of system design that do not encompass the essence of environmental resistance.