What is the function of the International Air Transport Association (IATA)?

The International Air Transport Association (IATA) plays a pivotal role in the aviation industry by setting global standards for air transport. This includes various areas like safety, security, and efficiency in air travel. IATA's standards are critical for facilitating international air transportation, ensuring that airlines operate under consistent regulatory frameworks and operational practices.

By establishing these standards, IATA helps promote safe and efficient air transport around the world, enhancing cooperation between airlines, air traffic controllers, and regulatory agencies. This supportive structure enables airlines to streamline operations, enhance service quality, and maintain safety protocols that are recognized globally.

The other options entail different functions not primarily associated with IATA. While regulating air traffic is typically managed by governmental bodies and air traffic control, environmental clearances are handled by environmental agencies and regulations. Monitoring aviation accidents falls within the realm of investigation and safety boards, which analyze incidents rather than establishing operational standards. Therefore, the focus of IATA as an organization clearly aligns with setting global standards, making that the correct response.