Answer:
The imagery Roosevelt uses in paragraph 12 of his speech is:
"Here destiny seems to have taken a long look"
This means that: The realization of what they expected to come might look long to come by but it will eventually be fulfilled.
Explanation:
The imagery made by Roosevelt in his speech gave a message of what destiny holds for them.
His speech was geared towards the need for faith and hope towards what the New World had in store for them.
