I would say the author uses irony in this passage that remembering his mother makes him not happy but miserable which may be the opposite of what is expected but he would rather suffer this than be happy in forgetting her as this latter feeling would be expected to make him sad.
Here is the answer to the given question above. Based on the given sample sentences, the best way to combine the sentences using a semicolon would be this: <span>The world’s nations must cooperate; one nation cannot solve the world’s problems by itself. The correct answer would be the second option. Hope this helps.</span>
These five components are:
the characters,
the setting,
the plot,
the conflict,
and the resolution.
You needed the answer to question 6 right? It's the first choice rock