Final Answer:
Sodium hydroxide relaxers are commonly called lye relaxers.
Option 1 is the correct answer.
Step-by-step explanation:
Sodium hydroxide relaxers are chemical formulations used in hair care to straighten curly or kinky hair. They are often referred to as "lye relaxers" due to the inclusion of sodium hydroxide, which is also known as lye or caustic soda, as the active ingredient. Sodium hydroxide is a strong alkaline substance that breaks down the disulfide bonds in hair, allowing for the restructuring of the hair's natural curl pattern. This process results in straighter hair. While effective, sodium hydroxide relaxers can be harsh, and their application requires careful attention to prevent scalp irritation or damage to the hair.
Option 1 is the answer: Sodium hydroxide relaxers