Question

what advice does the public health department offer to those concerned about the safety of food?
loose lips sink ships
a penny saved is a penny earned
when in doubt, throw it out

Explanation:

The phrase "When in doubt, throw it out" is a common piece of advice related to food safety. It means that if there is any uncertainty about the safety or quality of food (such as whether it has spoiled, been contaminated, etc.), it is better to discard it rather than risk consuming it and potentially getting sick. The other two phrases: "A penny saved is a penny earned" is about financial frugality and saving money, and "Loose lips sink ships" is a warning about the danger of careless talk (especially in a military or security - related context).

Answer:

When in doubt, throw it out