Suggesting food or non-alcoholic drinks to a customer who is drinking steadily is an example of:

Suggesting food or non-alcoholic beverages to a customer who is drinking steadily is an example of a gradual intervention technique — a low-key way to slow alcohol consumption and reduce the rate at which the customer's BAC rises, before more direct measures become necessary. Food slows alcohol absorption, and a non-alcoholic drink gives the customer something to consume without adding alcohol. These subtle steps are part of responsible service and can prevent a customer from reaching obvious intoxication, making a later refusal less likely to be needed.