The vES ending should be added to nouns that end in -f or -fe in their singular form. In that case, the -f or -fe is removed and -ves is added as a plural ending. Examples include: life - lives, wife - wives, knife - knives, wolf - wolves, leaf - leaves. But there are also exceptions, such as belief - beliefs, cliff - cliffs, roof - roofs.
I believe the answer would be relatability
A bystander but he also stood up for him so he is also considered someone who stood up for the victim
Have you considered looking at other summaries of this book? For the last one, it’s your opinion saying why or why not someone should read this book. You could say “I recommend this book to anyone who is into this book genre.” Also compare the book to other popular book series. (Will put more info in a moment)