What does pushing the T.O. CONFIG button on the ECAM control panel do?

Pushing the T.O. CONFIG button on the ECAM control panel simulates takeoff power application to trigger a warning if the aircraft is not properly configured for takeoff. This feature is crucial because it allows the flight crew to verify that all necessary parameters and configurations are set before initiating takeoff. If any parameters are not correctly set, the system generates a warning to alert the pilots, ensuring that they can address any configuration issues and maintain safety during the critical phase of takeoff. This proactive measure helps prevent potential problems that could arise from an improper configuration before leaving the ground.

The other options presented do not align with the actual function of the T.O. CONFIG button. For instance, resetting landing gear and flap logic pertains to different safety and operational checks not specifically linked to the T.O. CONFIG function. Likewise, aligning the aircraft navigation system is a separate function related to flight management rather than takeoff configuration checks. Lastly, simulating an airborne condition for pitot static system verification does not relate to the pre-takeoff configuration process. The T.O. CONFIG button is specifically designed to ensure an appropriate configuration for takeoff, making option D the accurate description of its purpose.