Final answer:
The question pertains to health and focuses on the importance of signaling before lane changes to prevent accidents. It underscores the role of traffic signals in improving road safety and pedestrian protection,
Step-by-step explanation:
The correct answer is option Health in the context of teaching proper driving and traffic safety practices.
When discussing why one should never change lanes of traffic without signaling first, the conversation revolves around maintaining safety on the roadways for both drivers and pedestrians.
Ensuring that all drivers signal before changing lanes reduces confusion and the likelihood of accidents. In particular, the presence of a traffic signal at an intersection greatly contributes to managing vehicle speed and providing safe crossing points for pedestrians.
The implementation of traffic signals is bolstered by statistics that indicate a significant reduction in accidents, thereby preventing potential injuries or loss of life.