Which situation would indicate the need for immediate rescue efforts?

The situation indicating the need for immediate rescue efforts is the downed power line near an intersection. This scenario poses a significant and immediate threat to public safety. Downed power lines can lead to electrocution risks for anyone in the vicinity, create hazards for passing vehicles, and disrupt essential services. Prompt action is necessary to prevent further injury or damage, making immediate rescue and response critical.

In contrast, a sprained ankle, while painful and potentially requiring medical attention, typically does not involve an immediate life-threatening situation that demands urgent rescue efforts. Similarly, a person feeling dizzy may require medical evaluation, but without further context (like loss of consciousness or serious symptoms), it generally doesn't constitute an emergency that requires immediate rescue. Lastly, a minor vehicle accident may necessitate assistance, but it usually can be managed without the immediate urgency that a downed power line demands.