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.

"time to steal from the rich and give to the poor"

faith or loyalty when pledged in a solemn agreement or undertaking.