Final answer:
The Shang Dynasty benefited from fertile soil and abundant rivers, with the Yellow and Yangtze rivers' floodplains providing rich silt that supported agriculture and population growth.
Step-by-step explanation:
The environmental features of the region in which the Shang Dynasty ruled that were advantageous include abundant rivers and fertile soil. The Shang Dynasty was established in an area characterized by fertile plains and river valleys, particularly the Yellow and Yangtze Rivers. These rivers provided a natural water supply and their floodplains deposited rich silt, creating exceptionally fertile soil that was conducive to agriculture. This enabled the dynasty to produce an abundance of food, contributing to a growing population and the establishment of one of the world's first large territorial states. Furthermore, advances in agriculture during this period, alongside the discovery of iron, contributed to significant social and economic development.