Why did feudelism develop

The people of western Europe needed a source of protection from many invading threats with order. As a result, they invented a system in which people of higher classes provided protection for lower classes in return for their loyalty to them.

Explanation:

the correct answer is ''the programs costs have risen dramatically in the recent past'' hope this !

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."