Answer
The author uses mostly adjectives to describe a deserted city. This creates a sense of apocalyptical world in which the poetic voice is completely alone.
Explanation:
The description of the city reflects modern themes in the sense that it often questions whether there is a meaning of life or not. Also, it creates a sense of isolation which creates an environment of despair and loss, which is a characteristic of modernism.
This is portrayed in the first stanza:
Let us go then, you and I,
When the evening is spread out against the sky
Like a patient etherized upon a table;
Let us go, through certain half-deserted streets,
The muttering retreats
Of restless nights in one-night cheap hotels
And sawdust restaurants with oyster-shells:
Streets that follow like a tedious argument
Of insidious intent
To lead you to an overwhelming question ...
Oh, do not ask, “What is it?”
