Possible answers: (a). irradiation (b). Cooking (c). Dehydration (d). sensory neurons (e). animal transport (f). Enzymes (g). nutrients (h). layers of fat

Fact 1: Microorganisms cause food to spoil. Fact 2: Irradiation kills microorganisms that spoil food. Given the two facts above, what can keep food from going bad?
Answer:
(a).