Which of the following actions is unsafe while driving?

Texting while driving is considered unsafe due to the significant distraction it causes. Engaging in this activity divides a driver's attention between the road and their phone, increasing the likelihood of missing critical visual or auditory cues related to traffic and road conditions. This distraction can lead to slower reaction times, impaired decision-making, and an increased risk of accidents.

In contrast, adjusting your radio while stopped, using a hands-free device for calls, and eating a snack during a long drive might still carry some risk, but they typically do not distract a driver to the same extent as texting, especially since radio adjustments and calls can sometimes be managed without diverting attention from driving too much when executed properly.