Final Answer:
The definition of sociology is option D. Sociology is the systematic or scientific study of human society and social behavior.
Step-by-step explanation:
Sociology, as defined in option D, encompasses the systematic and scientific examination of human society and social behavior. This broad field of study analyzes the intricate web of relationships, institutions, and patterns that shape human interactions within a given society.
By adopting a systematic and scientific approach, sociology seeks to understand the complexities of social structures, norms, and dynamics that influence individuals and groups.
The focus on "human society and social behavior" in option D highlights sociology's emphasis on investigating the collective aspects of human life. This involves exploring how individuals relate to one another, how societies organize themselves, and how various factors contribute to the formation of social patterns. In essence, sociology delves into the intricacies of social life, offering insights into the forces that mold human behavior and shape the fabric of society.