Final answer:
A good emergency evacuation floor plan includes multiple exit points, clear and illuminated exit routes, designated assembly areas, emergency lighting, and the practice of regular emergency drills.
Step-by-step explanation:
The statement that represents an element of a good emergency evacuation floor plan is "Clearly marked exit routes and assembly areas." A well-designed emergency evacuation plan should include multiple exit points to avoid congestion during an evacuation, clearly marked and illuminated exit routes that are easy to follow, designated assembly areas where occupants can gather once they have exited the building, and a strategy for emergency lighting in case of power failures. Moreover, conducting regular emergency drills is crucial to ensuring everyone knows how to act during an actual emergency.