Final answer:
Spilled liquids can create tripping hazards when left on the floor, while bright lights, warning signs, and visible markings do not.
Step-by-step explanation:
When left on the floor, spilled liquids can create tripping hazards as they can make the surface slippery. Bright lights, warning signs, and visible markings do not pose direct tripping hazards unless they are placed in a way that obstructs a person's path or creates a trip hazard.