Answer:
The answer is territoriality.
Step-by-step explanation:
Territoriality is an attempt to influence or enforce control over a given geographical location.
This behavior is observed in both humans and animals.
As regards the text above, territoriality is associated with nonverbal communication and it refers to people using space (territory) to communicate ownership or occupancy of areas and possessions.
Benjamin has been sitting in the second seat and he had begun to associate that seat as his.
This why when he walked in and saw someone else (Mateo) sitting on it, he became upset.
The behavior he exhibited was a mark of territoriality and was conveyed as a non verbal form of communication.