It’s a conjunction because it’s using for to state why she left and it continues the sentence
Mama means that there are bigger things in life to care about, that she should just be the bigger person.
C. Broca’s . . . frontal
Pierre Paul Broca was a physician who specialized in language. He became interested in Louis Leborgne, a man who couldn’t speak. After his death, Broca found the lesion on his brain which he deduced was the cause of Leborgne’s disability. This frontal lobe are became known as Broca’s area.
