How should flight attendants ensure that passenger safety cards are available?

Flight attendants ensure that passenger safety cards are available by confirming their presence in each seat back pocket. This method is effective because it allows the flight attendants to visually inspect the seat back pockets directly, ensuring that the cards are not only present but also accessible for all passengers. Safety cards contain vital information about emergency procedures, and having them properly placed in seat back pockets means that passengers can quickly refer to them if necessary. This practice also contributes to adhering to aviation safety regulations, which require that safety information is readily available to passengers.

Other methods, such as checking randomly or verifying with each passenger, may not guarantee that every seat has a card or that passengers have access to them when required. Distributing cards individually could lead to confusion or misplacement, reducing the effectiveness of ensuring that every passenger has access to this important safety information. Thus, confirming their presence in each seat back pocket is the most reliable and efficient approach.