Final answer:
Unique items are the least preferred for satisfying Government requirements due to their custom nature and the resource requirements associated with them.
Step-by-step explanation:
The type of item that is least preferred for satisfying Government requirements is unique items. Unique items are often custom-built or specially designed items that are not easily replaceable or standardized. These items can be problematic for the Government because they may require a significant amount of time and resources to create, maintain, and support. In contrast, commercial off-the-shelf (COTS) items, non-developmental items, and government-furnished property are generally more preferred because they are readily available, standardized, and easier to manage and maintain.