In the poem “Barbara Frietchie,” what “flapped in the morning wind”?

Question

the clustered spires
the peach tree
the flag
the window-sill

Answer 1

In the poem “Barbara Frietchie” by John Greenleaf Whittier, it is the flag that "flapped in the morning wind." This poem is about Barbara Frietchie, a woman who shows her patriotism during the Civil War by displaying the American flag.