What is the purpose of preservation?

Answer 1

to destroy microorganisms in food by heating and preventing recontaminating by microorganisms from outside

to alter the environment so as to prevent or retard growth of undesirable microorganisms. this can be achieved by removing available water from the food, reducing temperature, addition of preservatives, altering the gas composition, etc.

Answer 2

to minimize the growth of micro-oorganismms

Answer 3

check