What does a brake light communicate to other drivers?

A brake light communicates to other drivers that you are slowing down or coming to a stop. When a driver activates their brake lights by pressing the brake pedal, it signals to vehicles behind them that they need to reduce their speed or prepare to stop. This is crucial for road safety, as it helps prevent rear-end collisions. Other drivers rely on this clear visual cue to gauge the distance and speed of the vehicle ahead, allowing them to react appropriately.

In contrast, the other options involve different actions that do not use brake lights as indicators. Lane changes, acceleration, and turns are typically communicated through turn signals or the movement of the vehicle itself, rather than by the activation of brake lights. Thus, understanding that brake lights specifically denote a deceleration or stop is essential for safe driving and effective communication on the road.