The author compares imagination to a soaring bird in this poem (A). For example, the text states that "Or who describe the swiftness of thy course? Soaring through air to find the bright abode . . ." This quote from the text supports that the author uses imagination to refer to a soaring bird flying swiftly in the air.
Whom I have not seen for years is the adjective clause and cousins is the word it modifies
Just write a sentence about what your b day party is like using a/an like my birthday party will have a big cake... ect