Pyridine,shown below,is a heterocyclic aromatic compound. 
Definitions:
Casual Observation
An informal method of gathering information based on spontaneous, non-systematic observations.
Direct Observation
A qualitative research method involving the systematic watching and recording of behaviors, events, or phenomena in their natural settings.
Traditional Thinking
Traditional thinking refers to ideas and beliefs that are handed down from generation to generation, often resistant to change and rooted in historical and cultural precedents.
Sociological Thinking
The process of questioning the obvious, examining societal patterns, and considering the social context of behaviour.
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