The poet's language can indeed support various moods in a poem. In the option you provided, "It maintains a reverent mood by suggesting that poets can do the extraordinary," it suggests a sense of admiration and respect for the capabilities of poets. This reverent mood can be reinforced through the use of elevated language, imagery that evokes awe, and a focus on the profound impact poets have on the world.
When poets highlight extraordinary experiences, insights, or transformations brought about through poetry, it fosters a sense of wonder and appreciation. This choice of language and tone emphasizes the importance and power of poetry, creating a mood that elevates the art form and those who practice it.
In summary, the poet's choice of language directly influences the mood by aligning the reader's emotions with the theme of the poem, particularly in recognizing the extraordinary nature of poetic expression.