Explanation:

- Quasi Contract:

- These are obligations that the law enforces, despite no formal agreement.

- They aim to prevent unjust enrichment.

- The finder's responsibility of lost goods falls under quasi contracts.

- This is the correct option.

- Wagering Agreement:

- Involves betting or gambling on uncertain events.

- These agreements are generally void in many jurisdictions.

- Contingent Contract:

- Depends on the occurrence or non-occurrence of an uncertain future event.

- Used in insurance or conditional agreements.

- Caveat Emptor:

- Means "let the buyer beware."

- The buyer assumes the risk regarding the condition of goods before a purchase.