Answer:
1. and 4. is correct.
Step-by-step explanation:
A summon is call to appear in court.✅
Feudalism is a system of cooperation among people which was basically an exchange of gold for protection.❌
Land for protection...
A vassal was given the rights to control the fief and to have ownership of it.❌
A vassal like a man who gives protection to the lord in exchange for land.
A knight may serve a vassal in exchange for land. ✅