Industrial canning processes are designed to preserve foods by eliminating most contaminating microorganisms, yet canning technically does not sterilize food (according to the precise definition of sterilization) because .

hyperthermophiles may still be present.

Explanation:

Just like it is written in the first statement of the question above, the term "Canning" can simply be defined as a process used in preserving foods and this is done by packing the food to be preserved in a container and sealed. Foods such as vegetables, fruits, tomatoes and sea foods(fishes) can be preserved through canning.

Although, the process of canning involves heating to kill some micro organisms but according to precise definition of sterilization there might be some micro organisms that can still exist at such temperature of canning and these organisms are known as hyperthermophiles.

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b. lithosphere, asthenosphere, mesosphere   is the answer most likely