What are some examples of activities that soldiers should not walk engaged in?

The selection highlighting eating, using electronic devices, or smoking as activities that soldiers should not be engaged in while walking is correct due to the nature of these activities and their potential to distract soldiers from their environment. Soldiers are expected to maintain a high level of situational awareness and focus, which can be compromised by activities that require attention or that detract from their readiness.

Eating and smoking can create distractions and interfere with a soldier's ability to respond quickly to situations. Using electronic devices, such as cell phones, not only detracts from attention but can also lead to safety hazards, as it often requires additional cognitive processing that diverts focus from the task at hand. Ensuring that soldiers are fully engaged and aware of their surroundings is crucial for maintaining discipline and operational effectiveness.

The other activities listed, such as reading, chewing gum, or talking, may not carry the same level of distraction and can sometimes be acceptable in certain contexts, provided they do not interfere with the soldier's duties or situational awareness. Jogging, stretching, or exercising, while generally being physically beneficial, might also not align with the expectations for maintaining discipline and focus during particular duties or in specific environments.