Which rhetorical appeal does antigone use in an attempt to persuade ismene to her bury polyneices?

I think the answer is rhetoric.  This is used when you are trying to persuade or get their point through a particular situation.  This when she makes a rhetorical remark on her determination to bury her brother though she tries to convince Ismene, she fails.

i think that will have something to do with the mississippi river but google will know the full answer for sure