Answer: 4. uncertainty
“Thoughts of Hanoi” is a poem that reflects on the past and shows the uncertainty of what the future holds.
The poem progresses from the joys of childhood to the fear or uncertainty of what will happen in the future of the nation of Vietnam after the Civil War. Generally, the poem focuses strongly on reminiscence of the wonderful past and the anxiousness of the uncertain future.
The poem was a standout because of the use of beautiful imagery by the author to describe certain events.