Question

jethro tulls seed drill & charles \turnip\ townshends 4 crop rotation
urbanization
overpopulation
thomas malthus
tenement housing
colonies
britains geography & resources
capitalists
entrepreneurs

Explanation:

The table lists topics related to historical developments (like agricultural innovations, urbanization, population theories, colonialism, and economic actors) which fall under History (a subfield of Social Science). These topics pertain to studying past events, societal changes, and economic/social structures over time, aligning with historical analysis.

Answer:

The subfield is History (under Social Science).