Final answer:
Option 2: answer the phone is not parallel with the other items because it does not contain the gerund (-ing) form like 'filling the tank', 'wash the baby', and 'draft the essay'.
Step-by-step explanation:
In the group of items given, the task is to select the one that is not parallel with the others. In this case, Option 2: answer the phone is not parallel with the other items (Option 1: filling the tank, Option 3: wash the baby, Option 4: draft the essay). The reason is that 'answer the phone' lacks the -ing ending that the other options have, which represents the gerund form and maintains phrase parallelism.
To achieve parallelism in a series or list, each item should be in the same grammatical form. Here, options 1, 3, and 4 are in the gerund form, making 'filling,' 'washing,' and 'drafting' parallel. Option 2 should be changed to 'answering the phone' to fit in with the pattern established by the other actions.