In what way is a biography different from an autobiography?

Which word best describes the tone of this excerpt from daly's sixteen

Match the types of supporting evidence to the examples. fact anecdote expert opinion emotional appeal sarah's outcome illustrates what can happen when children are left alone too long. arrowright dr. malfoy says physical therapy is for a sprain. arrowright austin has a 21.9-minute average commute time. arrowright we pledge to never stop striving to pluck these vulnerable animals from the jaws of danger. arrowright

Nthis poem by ruskin bond, what does the use of the word heart-beats suggest about the narrator's attitude toward life?