John Keats' poems, and how they impact the reader? (1 Viewer)

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Hey guys! I recently got an english task where the question is

Although Keats' poems are deeply personal, his ideas about love, life, death and the power of imagination continue to impact the reader.

(I bolded what I think is important)
I have to refer to a poem we read in class, and the teacher is going to play one on the day of the task, and have to write about that too. Thing is, I dont know where to start, and the task is on friday! So if anyone could present some ideas, or messages regarding the ones above, I would greatly appreciate it!

BTW the poems I have to refer to are:
On first looking into Chapmans Homer
La Belle Dame Sans Merci
Ode to a Nightingale
Ode to a Grecian Urn


Thanks!