I need the entire sentence for context before I can answer the question. All of these options could be a subject, but you need to give context.
Answer:
The poet shows that a happy and contented life is made up of good friends and tranquility.
The poem shows how a man who had no valuables, material wealth and a good economic situation was happy and content with the life he lived.
Explanation:
Have a good day!
I think you should try studying a little every day.
The answer is Notary, so you do have the answer correct.