Final answer:
The use of a tray when delivering items depends on the context and nature of the items being delivered.
Step-by-step explanation:
The use of a tray when delivering items depends on the context and nature of the items being delivered. In situations where the items are small and easily carried, such as a server delivering drinks in a restaurant, using a tray might be expected. However, in other scenarios, such as delivering large packages or heavy objects, a tray may not be necessary or practical.
Ultimately, the expectation of using a tray when delivering items varies depending on the specific circumstances and requirements of the task.