______ a few of the sounds produced by insects can be heard by human.

With only

Only

There are only

None of these

Only a few of the sounds produced by insects can be heard by humans.

کیڑوں سے پیدا ہونے والی صرف چند آوازیں انسانوں کے ذریعہ سنی جاسکتی ہیں۔

"Only" correctly emphasizes the limited number of sounds.