The lack of a comma means that the happy part of his life was short. This is true, at the end, he is briefly happy. It is also ironic as the story is sad at the beginning, despite the reader reading the title thinking it will be happy. The title makes sense when he becomes happy at the end... Only to get shot and die. I hope this helped!
A. The Sea of Faith / Was once, too, at the full, and round earth's
shore / Lay like the folds of a bright girdle furled.
C. Sea horses are very unusual fish.
The word "fish" is a predicate nominative in letter C sentence. This is because a predicate nominative, also known as subject complement, is a noun or pronoun that follows a linking verb and renames the subject.
Sea horses - subject; are - verb; very unusual - adjectives; fish - predicate nominative.
A - Fish - subject
B - will fish - verb
D - fish - object
The interseption of the quote is nonviolence is a tool that can be used in many situations that won't cause conflict and destruction but bring peace