In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".
The bliss of (oversleeping) cuddled up under a warm and cosy blanket is just other-worldly.
Option 4) No improvement is the correct answer.
Bliss = happiness.
The person is describing a general experience or activity => we need to use the noun i.e oversleeping.