Answer:
When selecting a safety chain, consider:
Application: What purpose will the chain serve (e.g., hazard marking, crowd control)?
Environment: Will it be used indoors or outdoors? Are there extreme temperatures or harsh weather conditions?
Strength: How much weight or force needs to be withstood?
Visibility: How well should the chain be seen, especially in low-light conditions?
Durability: How long will the chain need to last?