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The process of rearranging curly hair into a straighter or smoother form is known as:

  1. Chemical hair relaxing

  2. Permanent waving

  3. Thermal straightening

  4. Hair rebonding

The correct answer is: Chemical hair relaxing

The process of chemical hair relaxing, also known as chemical straightening, involves applying a chemical solution to the hair that breaks down the bonds and rearranges the shape of the hair to make it straighter. This process is permanent and can last for several months. Option B, permanent waving, is the opposite process of creating curls in straight hair and does not involve straightening. Option C, thermal straightening, uses heat to straighten the hair and is a temporary method. Option D, hair rebonding, is a process similar to hair relaxing but involves using strong chemicals and heat to permanently straighten hair that is extremely curly or frizzy. Therefore, the process of rearranging curly hair into a straighter or smoother form is best described as chemical hair relaxing.