Which stylistic elements are responsible for the stately yet economical effect of these lines from a poem?

High forms
with the movement of gods,
Perilous aspect;
And one said:
"This is Actæon."
Actaeon of golden greaves!
(from "The Coming of War: Actaeon" by Ezra Pound)
syntax, imagery, and allusion
allusion, metaphor, and irony
imagery,irony, and syntax
irony, simile, and allusion

Question

Which stylistic elements are responsible for the stately yet economical effect of these lines from a poem?

High forms
with the movement of gods,
Perilous aspect;
And one said:
"This is Actæon."
Actaeon of golden greaves!
(from "The Coming of War: Actaeon" by Ezra Pound)
syntax, imagery, and allusion
allusion, metaphor, and irony
imagery,irony, and syntax
irony, simile, and allusion