Final answer:
Neutralization is the process that stops the action of permanent wave solution and rebuilds the hair into its new form.
Step-by-step explanation:
The process that stops the action of permanent wave solution and rebuilds the hair into its new form is neutralization. In the permanent wave process, a reducing agent is used to disrupt the disulfide bonds in the hair strands, causing the hair to take on a new shape. After the hair is placed on rollers or curlers, an oxidizing agent is applied to reform the disulfide bonds in their new positions, which is the neutralization process.