What is the primary role of the rearview mirror?

The primary role of the rearview mirror is to provide visibility of the area behind the vehicle. This essential function allows the driver to see what is happening behind them, which is critical for safe driving. By using the rearview mirror, a driver can monitor approaching vehicles, obstacles, or any other situations that may require their attention.

While options related to speed indication, temperature regulation, and parking assistance may involve different aspects of driving safety and vehicle operation, they do not encompass the core function of the rearview mirror. The ability to observe the rear area is vital for making informed decisions such as lane changes, merging, or reversing, thereby contributing significantly to overall road safety.