The poem has four stanzas, each describing a stage in the bird's life. Stanza 1 describes the bird living in an egg (shell), thinking the world is small and round. Stanza 2 describes the nest made of straw where the bird lived with its mother. Stanza 3 describes the bird fluttering out to see leaves. Stanza 4 describes the bird as an adult flying beyond the tree. The two extra options (c) and (e) are incorrect interpretations.