Transcendentalist Walt Whitman captured the spirit of young America by creating

Transcendentalist Walt Whitman captured the spirit of young America by creating a new form of poetry with free verse.

Explanation:

Transcendentalist Walt Whitman was rightly considered the national poet of America.

He had captured the spirit of young America by creating  a new form of poetry that had not been used that expensively anywhere in the world and used the form of free verse.

The free verse poetry that relied on pastoral topics and had allusions and spiritual made a distinctly American brand of poetry and it was unique to them and no one else could be doing it at that time.

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