What should be done to ensure safety and readiness after closing the boarding?

The correct course of action after closing the boarding is to arm doors and cross-check. This procedure is crucial for ensuring the safety of all passengers and crew. Arming the doors prepares them for emergency evacuation, allowing them to be opened quickly and efficiently if needed. Cross-checking involves verifying that all doors are properly armed against any potential mishaps, thus enhancing the aircraft's readiness for takeoff.

This step is vital in the pre-departure checklist, as it directly influences safety protocols that are in place to protect everyone onboard. All personnel involved in the process must complete this step to confirm that safety measures are fully implemented before the aircraft departs.

While checking cabin temperature, reviewing passenger lists, and ensuring all luggage is stowed are important operational tasks, they do not specifically address the immediate safety preparations required for flight.