The key roles are the following: promote international monetary cooperation; facilitate the expansion and balanced growth of international trade; promote exchange stability; and assist in the establishment of a multilateral system of payments.

IMF which stands for International Monetary Fund

Explanation:

International Monetary Fund (IMF), it is the international organization comprise of the 189 countries, who are working in order to foster the corporation of the global monetary, reduce poverty, promote high employment, secure financial stability, sustainable economic growth, and  facilitate international trade.

So, the following mentions,key as well as vital roles or the purpose or motive, which are promote international monetary, establish the multilateral system of payments., promote exchange stability are of the IMF (International Monetary Fund).

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