Persuasion is defined as the act of trying to convince someone of something, or the means of convincing someone to do something. When someone lists all the reasons why you should do something, this is an example of persuasion.
Answer:
A. weak : frail
Explanation:
"weak" and "frail" are the best option among the words listed in the question.
"Thin" and "gaunt" refer to they physical appearance of a person, who looks "frail" or "weak". The words "weak" or "frail" having more of a figurative meaning, that is still similar to "thin" or "gaunt".
to start a new era in his life
In the text it says, "She taught me my scales and exercises, too, on the little parlor organ", "I struggled with the 'Harmonious Blacksmith'", and "<span>I had been doggedly beating out some easy passages from an old score of 'Euryanthe'". The boy mostly practiced scales and exercises, but he also played "Harmonius Blacksmith" and "Euryanthe".</span>
Sentinel : sentire :: <span> sensuous : sonare.</span>