During a decompression, what is the flight attendant’s first priority?

In the event of a decompression, the flight attendant's first priority is to don the oxygen mask. This is essential for ensuring their own safety and ability to perform their duties effectively. The sudden loss of cabin pressure can lead to a rapid depletion of oxygen, causing hypoxia, which impairs cognitive and physical abilities. By wearing the oxygen mask first, the flight attendant can maintain their own oxygen supply, allowing them to remain functional and respond to the situation appropriately.

Once the flight attendant has secured their own oxygen supply, they can then proceed to alert the passengers and assist them in donning their masks, ensuring that everyone on board receives the necessary help during the emergency. The other options, while important, cannot be prioritized over personal safety in this critical moment.