Where is the Emergency Light Switch (ELS) located on the 737?

The Emergency Light Switch (ELS) on a Boeing 737 is typically located at the 2L door, which is on the left side of the aircraft, near the front. This location is important as it allows crew members easy access to the switch in case of an emergency situation when the cabin needs to be illuminated quickly. The ELS is crucial during an evacuation scenario or if there is a loss of cabin lighting.

Understanding the positioning of emergency equipment like the ELS is essential for flight attendants, as it enhances their preparedness during emergencies and contributes to passenger safety. The other choices, while part of the aircraft's design, do not house the Emergency Light Switch, making the location at 2L the correct answer.