Final answer:
One of the biggest safety concerns related to walking and working surfaces is slippery surfaces.
Step-by-step explanation:
One of the biggest safety concerns related to walking and working surfaces is slippery surfaces. Slippery surfaces can cause individuals to lose their balance and fall, resulting in injuries. For example, a wet floor or icy sidewalk can be extremely slippery and increase the risk of accidents.
Other concerns such as uneven surfaces, lack of handrails, and obstacles in the path can also pose safety risks, but slippery surfaces are particularly hazardous.