Answer: Feudalism development
Step-by-step explanation:
The statement from your question is referring to reasons for the development of feudalism.
- Feudalism was active between the 9th and 16th centuries back in medieval Europe. It started with attacks by Vikings and other people that were trying to get into other territory and when the government started to get weaker.
It was a combination of two customs which were military and legal.
Lord was the one who owned all the land and there were vassals and serfs who took care of the land and farm it.