Explanation:

- The phrase "a change in the form or nature of something" is best matched by the word "Metamorphosis."

- ?? Correct Answer: Metamorphosis

- This refers to a complete change in form, structure, or substance. Commonly used in biology for insects or amphibians transforming into adult stages.

- Hibernation

- This refers to a state of inactivity and metabolic depression in animals, not a change in form.

- Camouflaging

- This is the act of concealing an object or animal by making it appear to blend into its surroundings, not a change in form.

- Refraction

- This is the bending of light as it passes through different mediums, a physical phenomenon, not a change in form or nature.