Answer:
Protection for Land, is your best choice.
Step-by-step explanation:
The common folk generally exchange the rights of their land for protection under a regional lord or warlord, and the lord in turn essentially "contracts" the land out to knights to serve under him. Essentially land, which generally had rich soil that can be used reap nature's bounties, was used as a means to obtain protection for the ordinary, and glory for the powerful.
~