Final answer:
The poems by Wordsworth and Blake address the poet's role and imagination, while Whitman's poem symbolizes the creation of a nation, and Keats's poem deals with fears regarding the act of creation.
Step-by-step explanation:
The poems "The Poet's Role", presumably by William Wordsworth, and "Ode to Imagination" by William Blake directly address topics related to the poet's role and the imagination, respectively. While "O Captain! My Captain!" by Walt Whitman does not explicitly discuss the act of creation, it can be seen as a metaphor for the journey and ultimate creation of a nation, especially in its mourning of Abraham Lincoln's death.
John Keats' "When I Have Fears That I May Cease to Be" is particularly concerned with the act of creation, as the poet expresses anxiety about dying before he could have fulfilled his poetic potential. Each of these poems approach these themes in unique ways, echoing the sentiment found in Wordsworth's preface to Lyrical Ballads, where poetry is described as emotion recollected in tranquility, which suggests a reflection upon the process of creating poetry.