The author's attitude toward a subject, topic, or character of a piece of literature is called:

 The author's attitude toward a subject, topic, or character of a piece of literature is called tone.

Explanation: The tone is evident from the author's choice of vocabulary, and how seriously, humorously, angrily (etc.) s/he tells the story.

The tone of the author usually influences the mood of the reader.

i think one answer could be this poet uses no rhyme.