Why do you need to be prepared for changes in your immediate range? Your response time is much faster. Your response distance is much faster. Obstacles are much harde:to see when they're far away. Your response time is much slower.

The question is asking why it is important to be prepared for changes in your immediate range. The options provided are related to response time and distance, and the visibility of obstacles. The correct answer is "Obstacles are much harder to see when they're far away." This statement implies that when obstacles are far away, they are harder to detect, which can lead to accidents or collisions. Therefore, it is crucial to be prepared for changes in your immediate range to ensure safety and avoid potential hazards. The other options, such as "Your response time is much faster" and "Your response distance is much faster," are not directly related to the importance of being prepared for changes in the immediate range. The option "Your response time is much slower" is also not a valid reason for the importance of being prepared for changes in the immediate range.