He spoke __________, barely audible over the noise of the crowd.

The correct answer is Option (1) → softly

An adverb is a word that tells how, when, where or how much something happens. It can also describe an adjective or another adverb, for example she sings sweetly, very hot.

Complete sentence: He spoke softly, barely audible over the noise of the crowd. “Spoke” is a verb, so the blank needs an adverb that tells how he spoke. Barely audible means only just loud enough to be heard.

Option	What it tells	Example
(1) softly (answer)	adverb of manner: in a low, quiet voice (a soft voice is hard to hear in a noisy crowd)	Amma sang softly to put the baby to sleep.
(2) soft	an adjective: it describes a noun, not the verb “spoke”	She has a soft voice.
(3) softness	a noun: it names a quality and cannot describe how he spoke	The softness of the new pillow helped him sleep.
(4) harshly	in a rough and unkind way: a harsh voice is usually loud and does not match “barely audible”	The coach spoke harshly to the late players.