Your question is incomplete because you have not provided the options, which are the following:
A. Organizing
B. Writing the first draft
C. To edit
Answer:
C. To edit
Explanation:
Parallelism involves keeping the same grammatical structure. Thus, To edit is a full infinitive construction, which is different from gerund constructions like Organizing and Writing the first draft. As a consequence, option C does not follow the same grammatical feature or parallelism of the rest of the headings.