Which term represents the fluidity and naturalness of spoken language?

Fluency refers to the smoothness and fluidity of spoken language. It encompasses the ability to express oneself effortlessly and naturally, enabling speakers to convey their thoughts without hesitation or awkward pauses. High fluency facilitates effective communication, allowing the audience to engage with the content without distractions caused by disruptions in speech.

Articulation, though important, specifically relates to the clarity of individual sounds and the precision with which words are pronounced. Clarity focuses on how well the audience can understand the spoken words, which may not necessarily indicate fluidity. Pace pertains to the speed at which someone speaks, which can affect understanding and delivery but does not directly address the overall smoothness of language.

In capturing the essence of spoken language's natural flow and expressiveness, fluency stands out as the most accurate term.