What phrase is part of evacuation commands?

The phrase "Cross Your Arms" is part of evacuation commands because it serves as a safety protocol that passengers should follow in the event of an emergency. This action is important as it helps to ensure that individuals maintain a stable position during an evacuation, particularly during possible evacuation from an aircraft. Crossing the arms can also reduce the risk of injuries during a rapid descent or when exiting the aircraft, as it promotes a more controlled posture.

In contrast, the other options don't serve a practical function in an evacuation context. Maintaining calm is essential, but it is not a direct action command. "Jump for Safety" could lead to dangerous behaviors during a critical moment, while "Cover Your Ears" does not apply in an immediate evacuation scenario where physical actions are required to safely exit. Thus, "Cross Your Arms" stands out as a focused, actionable instruction that can enhance safety during evacuation procedures.