Concept:ECOWAS is a regional body created mainly for economic integration and mutual cooperation among West African states.
Explanation:The Economic Community of West African States, ECOWAS, was established on 28 May 1975 by the Treaty of Lagos.
It consists of 15 West African countries working together for economic development and integration.
Its main goal is to remove trade barriers and encourage the free movement of goods, services, and persons within the sub-region.
Over time, ECOWAS also adopted political responsibilities, such as peacekeeping and conflict resolution through ECOMOG.
This means the essence of ECOWAS is interstate economic and political cooperation, not the bringing together of political parties.
Options A, C, and D are all incorrect because they do not state the true purpose of the organisation.
Answer:B. foster interstate economic and political co-operation