What characteristic of birds does the poet in “ars poetica” admire in the simile that says “a poem should be wordless / as the flight of birds”? a. the birds’ nests b. the birds’ speech c. the birds’ movement

The answer for this question is "c. the birds' movement".

"A poem should be wordless
As the flight of words" In this famous line of Ars Poetica by Horace, the poet wants to emphasize the necessity of poems to be free just like how birds fly.