Urbanization has emerged as a need for consolidation and concentration of production, of common interests, and the achievement of higher wages, the improvement of agriculture as one of the conditions for it. Also, due to different ways of protecting interests, legalizing relations in such conditions, dividing rights, and consolidating the hierarchy that is needed for such conditions of production in urbanized environments, it was necessary to form governments. The exchange of agricultural resources is an essential element in increasing and improving production, as well as the exchange of cultural values and achievements in order to reach new knowledge and achievements in production. Climate change has led to the migration of the people, and their settlement much before urbanization but more for the reason of finding favorable living conditions, so this did not lead to population migration to more favorable production conditions.
The answer is: a.
