The correct options are
B Air-tight sealing.
C Storage for future use.
D Prevention of decay or spoilage.
Food preservation is a process which helps in the prevention of the growth of bacteria, fungi and other microorganisms in food. Different methods of food preservation includes:
∙ Use of preservatives, air-tight packaging, smoke-drying, etc.
∙ Air-tight sealing is done to prevent the re-entry of microbes. In the absence of oxygen, growth of many microrganisms are inhibited.
∙ Properly packed food items thus prevents the decay or spoilage of food, increasing their shelf life.