How do sector times function in racing?

Sector times are crucial in racing as they break down a lap into smaller, manageable segments, allowing teams and drivers to gain valuable insights into performance. By measuring the time it takes to complete each sector of the track, teams can analyze where a driver is gaining or losing time in comparison to others or their own previous laps. This detailed information helps in making strategic decisions, such as adjusting driving style, improving car setup, or determining when to push for a faster lap.

While other options touch on aspects of racing, they don't accurately reflect the role of sector times. For instance, predicting weather conditions, tracking fuel efficiency, and calculating total race distance are important for race strategy and performance, but they do not pertain to the function of sector times in evaluating and improving a driver's performance across different parts of the circuit.