Final answer:
The two symbol archetypes demonstrated in the poem 'Annabel Lee' are the Red Cross Knight and mirror images.
Step-by-step explanation:
The two symbol archetypes that are best demonstrated in the poem 'Annabel Lee' are the 'Red Cross Knight' and the 'mirror images'.
The Red Cross Knight is a symbol of chivalry and honor, representing purity and righteousness. In the poem, the speaker refers to his love for Annabel Lee as being like the love of the Red Cross Knight for his lady.
Mirror images is another symbol archetype demonstrated in the poem. Roderick and Madeline, who are twin siblings, represent mirror images of each other. Their shared reflection of 'doom' further emphasizes the fatalistic theme of the poem.