How did Feudalism work?

Select all that apply.

-A Lord would be given land by the king in return for homage or a promise to serve the king when called upon.

-A knight would be given a fiefdom by a vassal and act a part of a standing army for the vassal.

-A serf would be given a fiefdom by a knight and protect the lands outside of the castle walls.

-A vassal depended on the agricultural production of serfs to feed the whole system.

-A king would hire a vassal to provide an army and political advice during times of war.