Final answer:
William Wordsworth is the Romantic poet referred to in the question, and Emily Dickinson personifies a tree in one of her poems, 'They might not need me – yet – they might'.
Step-by-step explanation:
The Romantic poet referred to in the question is William Wordsworth. He is known as one of the key figures of the Romantic period in English literature.
The poet who personifies a tree by saying it lifts its arms in prayer, lives intimately with rain, and wears a nest of robins is Emily Dickinson. In her poem, 'They might not need me – yet – they might', she uses vivid imagery to describe the tree.