The benefits to be derived by ECOWAS member countries include all the following except

The question is asking to identify which option is NOT a benefit to be derived by ECOWAS member countries. Therefore, the answer is the option that does not provide a benefit. In this case, the answer is "territorial expansion" because ECOWAS is not about territorial expansion but rather a regional economic union aimed at promoting economic integration among its member countries. The other options, such as free movement of people, free flow of capital, and the creation of a large market, are all benefits of ECOWAS as they enhance economic cooperation, integration, and development among member countries.