Allusion is a reference to something. It's to imply a meaning based on an external thing.
Answer:
It might be about the cultural and societal status of different people.
Explanation:
If you think about the phrase, "Pearls before swine" it is suggesting that a pig would find pearls useless. 'Of Mice and Men' could be implementing the rank, so to speak, of others, comparing one class of people as 'mice' and the other as 'men'. The novel could be comparing and contrasting these to levels of people or things, therefore, making it about societal status.
If this is multiple choice you need to add the choices.
They could not help whoever was dying or they couldnt prevent death of helping somone or maybe they couldnt stop killing people
Childish would be the right answer! Hope this helps<3