Answer:
e. Collateral
Step-by-step explanation:
Collateral refers to the security given by the person in order to secure the right of the creditor.
As for example, if I take a loan from bank and then sign an agreement to pay in installments, then the bank might secure its payment through a collateral to be paid by me. For this I might give the bank papers of my house.
In the given case also, Dennis took the Television in exchange of money promised to be paid in installments. Further as for collateral he provided the owner the right to take back the television.
Thus, there is a collateral provided, and since he has defaulted in payment owner has the right to collect television back.