Final answer:
The primary responsibility of front waiters during a buffet is to tidy and replenish food on the buffet.
Step-by-step explanation:
The primary responsibility of front waiters during a buffet is to tidy and replenish food on the buffet. This means that they are in charge of ensuring the buffet station is always well-stocked with fresh food and that the presentation remains neat and presentable. The front waiters may also assist in delivering food from the kitchen, but their main focus is to maintain the buffet area.