During turbulence, what should flight attendants instruct passengers to do?

The correct instruction for passengers during turbulence is to fasten their seatbelts and remain seated. This is essential for their safety as turbulence can cause sudden jolts and movement of the aircraft. Keeping passengers seated with their seatbelts fastened minimizes the risk of injury from unexpected changes in altitude or direction.

Passengers who are seated and buckled up are less likely to be thrown from their seats or collide with other passengers or objects in the cabin, thereby reducing the potential for injury during turbulent conditions. Flight attendants play a crucial role in ensuring that this safety protocol is communicated effectively, maintaining order and safety in the cabin during these challenging situations.

The other options, such as standing for impact, using electronic devices, or gathering in the aisle, could lead to increased risks and complications. For instance, standing could result in passengers falling or being thrown about, while using electronic devices can distract from the safety instructions provided and may even become projectiles. Thus, ensuring everyone is seated and secured with their seatbelts is the most prudent and effective measure during turbulence.