What was one difference between Arabs who lived in towns and Arabs who were nomads?

While Arabs living in towns used camels, nomadic Arabs did not.
While Arabs living in towns created irrigation canals, nomadic Arabs did not.
While nomadic Arabs settled near oases, Arabs living in towns settled only in mountainous regions.
While nomadic Arabs created terraces for farming, Arabs living in towns raised goats and sheep.

While nomadic Arabs settled near oases, Arabs living in towns settled only in mountainous regions.