Select the most appropriate meaning of the given Idiom:- "Drowning out"

Making a louder noise so as to make other inaudible

The most appropriate meaning of the idiom "to drown out" is making a louder noise so as to make other inaudible. The idiom comes from the literal meaning of drowning, which is to be submerged in water and unable to breathe. In the same way, when someone says that they are "drowning out" something, they are saying that they are making a noise that is so loud that it makes it impossible to hear anything else.

The other options are not as accurate. Drowning of someone means to cause someone to drown. Helping a drowning person means to rescue someone who is drowning. A period of dullness or inactivity means a time when there is not much activity or excitement. None of these meanings are the same as "making a louder noise so as to make other inaudible."