Caged Bird Questions and Answers

What implied comparison is there in the following lines from the poem “I Know Why Caged Bird Sings” by Maya Angelou? The free bird leaps on the back of the wind and floats downstream till the current ends

Why does Maya Angelou repeat the lines “his wings are clipped and his feet are tied” in her poem “I Know Why the Caged Bird Sings”?

How would you relate the caged bird in the poem ‘I Know Why the Caged Bird Sings’ By Maya Angelou with the life of some people in the present world?