What are 4 types of settlements in order from smallest to largest in west Africa?

In West Africa, settlements can be categorized from smallest to largest as follows: 1) hamlets, which are small groups of houses often inhabited by a few families; 2) villages, which consist of a larger number of homes and can support more community activities; 3) towns, which serve as local economic and administrative centers with various services; and 4) cities, which are major urban centers with significant population density, infrastructure, and economic opportunities.