I think its affect is when <span>The persona of Dickinson's poem meets </span>personified Death<span>. Death is a gentleman caller who takes a leisurely carriage ride with the speaker to her grave.</span>
Based on the given sentence above, the function of the noun clause is as the DIRECT OBJECT. A direct object is a noun that directly receives the action of the main verb in the sentence. In this sentence, the noun clause directly receives the action of the verb "learned". Hope this answers your question.