What does the noun "experience" refer to?

The noun "experience" refers to something that you have done or that has happened to you, accurately capturing the essence of personal involvement or participation in events. This definition encompasses both the lessons learned from practical engagement and the accumulation of knowledge resulting from those events.

In contrast, the other options describe concepts that do not align with the broad, personal nature of "experience." A situation that is planned in advance implies forethought and intention but lacks the spontaneity and personal involvement inherent in the term. Theoretical concepts or ideas refer more to abstract notions rather than lived realities, while a skill obtained through observation narrows the meaning of experience to learned abilities, disregarding the wealth of direct interaction and participation that the term generally implies. Thus, option B encapsulates the full scope of what "experience" signifies.