Explanation:

 The functions of the International Bank for Reconstruction and Development are:
1. The assistance and development of territories of its members
2. The promotion of a balanced growth in international trade
These are provided in the Articles of Agreement of the International Bank for Reconstruction and Development, Art. I.
The International Development Association seeks to
1. Promote world development, increase productivity and standards of leaving in the less developed countries of its membership
2. Assist the International Bank for Reconstruction and Development
(Articles of Agreement of the International Development Association, Art. I).
The main purpose of the International Finance Corporation is to further economic development through the encouragement of productivity of private enterprises in member countries.
The primary objective of the Multilateral Investment Agency is to encourage the flow of private investments for productive purposes among countries.
Finally, the purpose of the International Centre for the Settlement of Investment Disputes provides facilities for conciliation and arbitration of investment disputes between Contracting States and nationals of Contracting States.