Which of these actions is unlawful when handling a decedent's remains?

The selection of stealing from a trust as the unlawful action is accurate because it represents a clear violation of legal and ethical standards governing the handling of a decedent's estate. When someone misappropriates funds or property that are designated in a trust, it not only undermines the trust's purpose but also constitutes theft. This action breaches fiduciary duties and can result in legal consequences, including criminal charges.

Conversely, the other actions listed, such as communicating with family members, sharing information about the deceased's wishes, and offering memorial services, are all lawful and typically considered part of the respectful handling of a decedent's remains and their estate. These actions support effective communication and fulfill the wishes of the deceased, thereby honoring their legacy and ensuring that the family's needs are met during a difficult time.