Question

Which sentence contains parallel structure?

Jonah has two ultimate goals: becoming a published columnist and writing a book.
Jonah has two ultimate goals: becoming a published columnist and to write a book.
Jonah’s two ultimate goals are to become a published columnist and writing a book.
Jonah’s two ultimate goals are becoming a published columnist and to write a book.

Answer 1

I believe the first one. Sorry If I didn't help.

Answer 2

Parallelism, also called parallel structure, is the repetition of a chosen grammatical form within a sentence when you make each compared idea or item in the sentence to follow the same grammatical pattern.

In the case of the options available, the only one that does that is:

Jonah has two ultimate goals: becoming a published columnist and writing a book.