A commemorative speech has to do with celebrating something or someone. If you want to pay tribute to someone (and there isn't a specific topic you have to talk about), you should talk about someone important to you, someone whom you love and who inspires you - it could be a family member or a friend, or someone you look up to.
A, selecting an appropriate topic
Answer:
The story teller whose work takes him all over the world, at the moment is in Japan.
Prague, is my hometown where the boy grew up in the story.
I can't figure out the last one sorry
Answer:
A) The importance of community.
Explanation:
As the mother desperately informs her neighbors of the missing child, they take initiative to assist her in finding the boy which shows the importance of community because they are willing to help each other in a time of need.
The point of view that is revealed is that she is scared and is assuming that the minister's family is not going to like their christmas dinner and the way that their family act.