Final answer:
The handle of serving utensils should not come into contact with food to avoid contamination.
Step-by-step explanation:
When food is on display, the part of the serving utensils that should never come into contact with food is the handle. Handles are designed to be held by servers and guests; therefore, they could be contaminated by hands. It is important for food safety to prevent serving utensil handles from touching the food to avoid cross-contamination. Utensils such as blades, forks, and spouts are meant to come into direct contact with food under safe and sanitary conditions.