Which of the following zones in Nigeria has least concentration of manufacturing industries?

The zone in Nigeria that has the least concentration of manufacturing industries is the North-Western zone. This is because the North-Western zone is predominantly agrarian, with a focus on livestock farming and crop cultivation. As a result, the zone has limited industrial development and lacks the necessary infrastructure and resources to support a thriving manufacturing sector. In contrast, other zones such as the Western zone and South-Eastern zone have a long history of industrialization and are home to some of Nigeria's largest and most developed cities, such as Lagos and Onitsha. Overall, while the North-Western zone has enormous potential for economic growth, its focus on agriculture means that it is currently the least developed in terms of manufacturing industries.