PLEASE HELP Read the second stanza from the poem "Sympathy." I know why the caged bird beats his wing

Till its blood is red on the cruel bars;

For he must fly back to his perch and cling

When he fain would be on the bough a-swing;

And a pain still throbs in the old, old scars

And they pulse again with a keener sting—

I know why he beats his wing!

What is a central idea in the second stanza of the poem "Sympathy"?

The caged bird does not know why he beats his wing.

The caged bird longs to be on his perch.

The caged bird beats his wing because he cannot be free.

The caged bird does not know how to fly anymore.