Final answer:
In order assembly, items prepared last are often those that require freshness or are sensitive to time, such as fresh produce in a food item or adhesives in manufacturing, to ensure they remain high-quality when served or used.
Step-by-step explanation:
When considering order assembly in businesses, especially in fast-food or assembly line environments, certain items are typically prepared last. These are items that are best served fresh or that quickly degrade in quality if left waiting. For example, in a fast-food restaurant, items like lettuce and tomato for a burger, or whipped cream for a coffee drink, are often added last to ensure they remain fresh and visually appealing. Similarly, in other assembly processes, components that are sensitive to time or environmental factors, such as adhesives or sealants that may dry out, are applied as the final steps in the product assembly.