Step 1: Identifying the correct option:
Indian rural society is traditionally marked by a relatively homogeneous population (similar occupation, culture and way of life), not a heterogeneous one - heterogeneity (great social, occupational and cultural diversity) is instead a defining feature of urban society.
Step 2: Why the other options are wrong:
The caste system, primary (face-to-face, personal) relationships, and dependence on nature/agriculture are all classic, well-documented features of Indian village life.
Final Answer:
Heterogeneous population (Option B)