All of the following are toners EXCEPT?

The correct answer is A, as low lightening products are not classified as toners. Toners are typically used after the bleaching or lightening process to adjust the tone of the hair, providing a desired color finish.

Pastel toners, neutralizing toners, and color balancing toners all serve the purpose of modifying and enhancing the existing hair color. Pastel toners could be used to create lighter, softer hues, while neutralizing toners specifically aim to counteract unwanted warm or brassy tones in the hair following a lightening treatment. Color balancing toners are also used to achieve a more uniform or desired shade.

In contrast, low lightening products are designed to add depth or darker shades to the hair, rather than correcting or enhancing the tone after lightening, which distinguishes them from the toning category.