It’s the last one it says what she’s doing
Thesis statement
explaintion: it makes up the evidence to support your main idea
The statements that describe how Feudalism work is :
1. A lord would be given land by the king in return for homage or a promise to serve the king when called upon.
4. A vassal depended on the agricultural production of serfs to feed the whole system
5. A king would hire a vassal to provide an army and political advice during times of war
Legalism would be the best way to go.
Hope it helps.