Which of the following conditions suggests that a client needs a specific haircare product?

A client with dry and brittle hair clearly indicates a need for a specific haircare product designed to address those issues. This condition often results from a lack of moisture and nourishment in the hair, which can lead to breakage and frizziness. To improve the texture and strength of their hair, products that provide hydration, such as deep conditioners, moisturizing shampoos, or leave-in treatments, would be beneficial. These products often contain ingredients that replenish moisture and improve the overall health of the hair.

In contrast, normal oil production, healthy shine, and non-frizz hair suggest that the hair is in good condition and does not necessarily require specialized products. Instead, these conditions indicate that the existing haircare routine is already effective, and the hair may require maintenance rather than corrective treatments.