Much of Jasmine's arc in the film is about her summoning the courage and confidence to speak up about what she believes in, and making sure her father listens. Jafar is her biggest hurdle in doing this, because 1.) he's still a rageing misogynist, 2.) he's devious as f*ck, and 3.) he has a magic serpent staff that can hypnotize anyone into doing his bidding.
Jasmine clashes the most with Jafar over his insistence that their country go to war with their allies, one of which happens to be the country that Jasmine's mother was from. Although the original Jasmine was just as spunky, Ritchie's film highlights just how intelligent and knowledgeable the character truly is.
She's seen standing up to all the men in her life multiple times, pouring over maps and battle plans, and advising her father on what they should do and how the people of Agrabah should be treated. It's no wonder she gets a powerful ballad about her struggles!