The author emphasizes the size of New York City to show that it's actually quite small compared to nature and the ecosystem. The author emphasizes the "colossal" size of New York as an ironic source with the purpose of showing that even the strongest concrete city can be drawn by the power of mother nature itself.
Which is the underlined word? I can’t give you a proper answer unless I know.
Some injuries can paralyze people.
The farmer branded all of his cows.
The postman carries many parcels to the front door.
The is a high intolerance for bullying in the school.
The girl in bright pink was very conspicuous.
(Hope this helps!)