Question

Which sentence has a parallel structure? Consider a sketch of the plot structure, explaining the central theme, and describe the main character. Consider a sketch of the plot structure, explaining the central theme, and describing the main character. Remember to sketch the plot structure, to explain the central theme, and to describe the main character. Remember to sketch the plot structure, explain the central theme, and describing the main character.

Answer 1

The sentence that has a parallel structure is Remember to sketch the plot structure, to explain the central theme, and to describe the main character.
A parallel structure means that the same form of a verb is used - to sketch, to explain, to describe.