Answer:
It, That, This
Explanation:
<u>It </u>is small and round - talking about something.
<u>That </u>is small and round - pointing at something someone is holding or you can see.
<u>This</u> is small and round - pointing/talking about something you are holding or gesturing towards.
The tone in the last stanza is regretful. The poem is about a man who received advice from a wise man that he can give away all his wealth but not his heart. He's told that once you give away your heart, you lose it and end up regretting it. He experiences it and regrets afterwards.
Narrator feels saddened because "A flow of disappoint rushed across my mind." The creature felt amused because "He came straight up to me and laughed into my eyes."
Hope this helps, if you have any other questions please do ask :)