READ THIS POEM: (1) A free bird leapson the back of the wind and floats downstream till the current ends (5) and dips his wing in the orange sun rays and dares to claim the sky. But a bird that stalks down his narrow cage (10) can seldom see through his bars of rage his wings are clipped and his feet are tied so he opens his throat to sing. (15) The caged bird sings with a fearful trill of things unknown but longed for still and his tune is heard (20) on the distant hill for the caged bird sings of freedom. The free bird thinks of another breezeand the trade winds soft through the sighing trees (25) and the fat worms waiting on a dawn bright lawn and he names the sky his own. But a caged bird stands on the grave of dreams his shadow shouts on a nightmare scream his wings are clipped and his feet are tied (30) so he opens his throat to sing. The caged bird sings with a fearful trill of thingis unknown but longed for still (35) and his tune is heard on the distant hill for the caged bird sings of freedom.* In the poem, "I Know Why the Caged Bird Sings.' by Maia Angelou, what is the purpose of lines 15-30?

1. To demonstrate how close the caged bird is to death.

2. To show that all birds are happy and sing for different reasons.

3. To contrast the lives of the free and the caged bird.