Question

What will the speaker of "My City" most regret losing when he dies? Question options: the brightness of the world

Answer 1

The experience of city life.

"never again behold my city"
"From being of her a part, her subtle spells, her shining towers, her avenues, her slums"
"Manhattan's sights and sounds, her smells"

These are some examples as to why it is the experience of city life, and not the other too. 

hope this helps

Answer 2

The speaker of "My City" will most likely regret losing the experience of city life.
Hope this helps!