Answer: ''Before'' and ''finally''
Step-by-step explanation:
With ''Before'' and ''Finally '' readers will easily clarify when and how the events have happened in the poem so they will have a better insight into the theme of it.
It is helping to create and order of the events and readers will know in that case when did some events happen.
The words before and finally will create a ''chronological'' structure which is following the order of already happened events.
Without and words, friends and giggles and crouched and low are not the correct answers because they cannot create a chronological structure.