The option that describes a process explanation is a step-by-step process, such as a math formula or a scientific technique.
<u>A process explanation</u> is a type of explanation that focuses on a specific pattern of organization. <u>It concentrates on the step-by-step organization</u>, which means it pays great attention to the steps or stages of a certain process. In that way, <u>the main aim of the process explanation is to help the reader to understand each of these stages</u>. Generally, an introduction is included in this piece of writing in order to define the process that is going to be explained.