Which of the following is an example of a psychological impact that may need to be disclosed?

The correct choice highlights a specific type of disclosure related to the psychological impact of a property. When a property is said to be "reportedly haunted," it pertains to the feelings and perceptions that potential buyers may have about living in such a space. This type of information can influence a buyer's emotional response and willingness to purchase the property, making it a significant factor worth disclosing.

In real estate transactions, psychological impacts pertain to subjective feelings that could affect a buyer's decision. Sellers and agents are often required to disclose information that might evoke an emotional reaction. In this case, beliefs about the paranormal directly tie into those sentiments and can greatly influence a buyer's perception.

The other options, while they may also have significant implications in property transactions, typically correspond more with objective facts or legally mandated disclosures rather than subjective psychological impacts. For example, a serious illness in a previous owner, a natural disaster that occurred, or a property's historical significance, while potentially important to disclose, do not evoke the same subjective emotional response that reports of a haunting might elicit.