Which of the following contributes the highest amount of foreign exchange to the economy of West African nations?

Among the options given, tourism is likely to contribute the highest amount of foreign exchange to the economy of West African nations. This is because West Africa is home to several popular tourist destinations, including beautiful beaches, wildlife parks, cultural sites, and historical landmarks. Tourists from all over the world visit West Africa to experience its unique culture, history, and natural beauty, and in turn, they spend money on hotels, transportation, food, souvenirs, and other local goods and services. This creates jobs and income for the local population and generates foreign exchange for the economy. While other sectors such as extraction and farming are also important, they may not generate as much foreign exchange as tourism due to factors such as fluctuating commodity prices and global demand.