Final answer:
The most effective method to keep Trent safe is to use an elimination diet, meticulously avoiding any food containing milk or milk derivatives to prevent allergic reactions.
Step-by-step explanation:
To keep Trent healthy, considering he has a milk allergy, the most effective strategy would be using an elimination diet. This means removing all foods and ingredients from his diet that contain milk and any milk derivatives. By avoiding these allergens, Trent can prevent allergic reactions, which may include symptoms like hives, digestive distress, or even more severe reactions like anaphylaxis.
An elimination diet involves carefully reading food labels, understanding ingredient lists, and ensuring that Trent stays clear of all products that might contain milk. It is also advisable to learn about alternative food options and substitutes that do not contain milk or milk products, thus ensuring his diet remains nutritious and balanced without the inclusion of milk.