His voice was barely ____ from the back row of the auditorium.  *11 pointswillaudiblekeepsake

To fill in the blank in the sentence "His voice was barely ____ from the back row of the auditorium," the most appropriate word from the options provided is "audible."

Explanation:

• "Audible" means able to be heard, which fits the context of the sentence where it mentions that the voice was barely able to reach the audience sitting in the back row.
• "Keepsake" does not fit thematically, as it refers to an object kept as a reminder of a person or event, which does not correlate with the concept of sound or voice.

Thus, the completed sentence reads: "His voice was barely audible from the back row of the auditorium."