Showing that Sergei considers the goldfish to be his friend, there does not seem to be a conflict with the relationship between the two. And, yes. It can be called a friendship because any two living organisms can be friends if there wanted to.
The figurative language that is used by Mr Shiflet reveals that he is a character who is intelligent and wise. To be able to use an appropriate analogy requires knowledge and experience. This means that Mr Shiflet is old and has gone through a lot of things in his life.
Violent movies can show people what could be happening in the real world.
The answer is C, murder causes an all-encompassing guilt.