Final answer:
Jack's statement about the necessity of rules to avoid savagery is an observation about the importance of social order, which doesn't fit the definitions of allusion, metaphor, dramatic irony, personification, or pun.
Step-by-step explanation:
The statement "We've got to have rules and obey them. After all, we're not savages." by Jack is an example of a(n) observation. An observation suggests something that is generally true about the text or situation, which is not to be confused with the other options such as allusion, metaphor, dramatic irony, personification, or pun.
In this case, Jack is making a general assertion about the importance of order and rule-following within a society, as opposed to referencing another text (allusion), representing one thing as another (metaphor), having a hidden meaning understood by the audience but not the characters (dramatic irony), giving human characteristics to non-human entities (personification), or playing on words (pun).