Final answer:
A society with cities is still called agrarian if agriculture is its primary mode of subsistence, as it represents the foundational economic activity even with the presence of urban development and complexities of political and social organization.
Step-by-step explanation:
An agricultural society that has cities is still called agrarian because the primary mode of subsistence is based on agriculture. Even as societies develop and construct cities, the foundational economic activity remains the cultivation of land and production of crops. This continued dominance of agriculture in societal structure and economy preserves the designation of 'agrarian', emphasizing the rural and farming aspects even in the presence of urban centers.
In the Agrarian Age, humans settled and began to cultivate land, leading to the development of technologies for agriculture and eventually to the rise of cities and more complex forms of political and social organization. However, agricultural practices continued to be at the heart of these societies, providing the surplus necessary for population growth, specialization, and urbanization. Thus, the term 'agrarian' encompasses both the rural cultivation practices and the broader societal structure that relies on this agricultural base.