Passage Summary: Natural fibers like cotton are naturally curly but are flattened out to make clothes; when you wash them in hot water, they try to curl back up, which causes shrinking, unlike synthetic clothes.

Reasoning: Natural fibers are naturally curled and straightened for cloth, while heat returns all fibers to their original state; natural fibers shrink in heat, but artificial ones do not.

Analysis: This is a synthesis task where we must combine the provided rules to find a logical consequence. We are told that heat forces *all* fibers back to their 'original states' and that this process causes natural fibers to shrink because their original state was curled. Since artificial fibers do not shrink under the same conditions, we can reasonably infer that their 'original state' must not be curled. If artificial fibers were originally curled, they would also contract when heated. Look for an answer that reflects this difference in the physical properties or 'original states' of the two fiber types.