Final answer:
The characteristic of Anglo-Saxon poetry illustrated by 'The Seafarer' is the celebration of heroic achievements.
Step-by-step explanation:
The characteristic of Anglo-Saxon poetry illustrated by 'The Seafarer' is the celebration of heroic achievements. 'The Seafarer' is an Old English poem that focuses on the themes of loneliness, the hardships of life at sea, and the longing for glory and fame through heroic deeds. The poem emphasizes the bravery and courage of the seafarer, which is a common motif in Anglo-Saxon poetry.
Learn more about Anglo-Saxon poetry