The nonfiction genre that teaches the reader a process is the How-to genre.
The nonfiction genre that primarily focuses on teaching the reader a process is the "How-to" genre. How-to books are specifically designed to guide readers through a step-by-step process or provide instructions on how to do something. These books aim to teach the reader a skill, technique, or method in a practical and easy-to-understand way. They cover a wide range of subjects, such as cooking, gardening, DIY projects, self-help, and more. So, the correct answer is option number 2, "How-to."
