One of the chief functions of the united nations is to disputes between member nations

The correct answer is - resolve.

The United Nations have multiple functions, and one of the most important is to resolve the disputes between the nations. With this action, the United Nations are trying, and very often managing, to resolve the disputes in a peaceful manner, and thus avoid military conflicts.

Unfortunately, this is not always working, so the United Nations allow certain countries, dubbed as world peace keepers, to use military power in order to put a certain situation under control.

The Chief Function of the United Nation are discussed below.

Explanation:

According to the charter of the United Nation, some other functions of the United Nation are

c) troops march forward in close formation against newer, more accurate weapons