What does the ICAO primarily aim to achieve in civil aviation?

The primary aim of the International Civil Aviation Organization (ICAO) is to secure international cooperation and standardization in civil aviation. This focus on cooperation ensures that different countries can work together effectively and harmoniously in managing air traffic, developing aviation regulations, and ensuring safety and security across international borders. By establishing global standards and recommended practices, ICAO enhances efficiency, safety, and security in aviation, facilitating smoother operations that are recognized internationally.

These standards help to ensure that all member states have access to the same level of safety protocols and operational procedures, which is essential for maintaining safety in the increasingly crowded skies and supporting the growth of global air transport. The organization's emphasis on collaboration allows for unified responses to challenges such as security threats, environmental impacts, and technological advancements in aviation, thus promoting a safer and more efficient air transport system worldwide.

The other options suggest aims that do not encapsulate the primary mission of ICAO. Developing regional travel plans is more focused and localized, while reducing flight operations and minimizing international flights conflict with the goal of promoting air travel and connectivity.