Answer asap for a test !

In exchange for land, a knight agrees to be a sort of sub-vassal to a vassal. this agreement was known as: investiture homage tyranny subinfeudation

Describe two reasons that cities developed along rivers during the industrial revolution. for full credit, your response must be at least 2 complete sentences.

Discuss the role of policy analysis in policy modification. include a description of a federal agency that supports policymaking through policy analysis.