Final answer:
The term that matches 'voice' the closest is b) 'utterance,' as it denotes the action of expressing thoughts or feelings through spoken sound. Articulation is crucial for clear communication, especially in formal settings.
Step-by-step explanation:
The word that matches "voice" most closely from the given options is b) utterance. Utterance refers to the action of saying something aloud or expressing something with words. While all the options provided are related to speaking or communication, the term 'voice' broadly refers to the expression of thoughts or feelings through spoken sound which is an utterance.
Human speech is a complex process that includes shaping the cavity formed by the throat and mouth and involves the vibration of vocal cords and articulation with the help of the tongue. Regarding the loudness of sound, it is described as intensity level or decibel. When considering the meaning closest to the hypothesis, d. suggestion is the most appropriate choice since a hypothesis is a proposed explanation that is yet to be tested. Articulation indicates the clarity with which someone produces sounds and is crucial for effective communication, especially during presentations.