What is the primary purpose of using the lower-hand-and-forearm technique?

The primary purpose of using the lower-hand-and-forearm technique is to protect the body from obstacles. This technique involves utilizing the lower hand and forearm to detect obstacles in the environment, allowing an individual to navigate safely and effectively. By extending the lower hand and forearm, a person can sense objects that may be in their path, which helps in avoiding collisions and preventing falls. This proactive approach is particularly essential for individuals with visual impairments, as it enhances their ability to travel through complex environments by providing tactile feedback and spatial awareness.

While the other options touch on important aspects of mobility and body mechanics, they do not specifically align with the primary function of the lower-hand-and-forearm technique. Enhancing mobility in open areas, promoting healthy posture, and improving dynamic balance are relevant considerations in mobility training but do not capture the main intent of obstacle detection and body protection that this technique provides.