Which sentence uses parallel structure?
a. once things are done, there is no need to dwell on them, to worry about them, or to decide who is to blame.
b. as long as you use your best judgment, learn from your mistakes, and taking advice, you'll grow as a person.
c. science provides us with some answers, some questions, and figuring out how our world works.
d. spring is a time for growth, renewal, and to rain.

Answer;

A.Once things are done, there is no need to dwell on them, to worry about them, or to decide who is to blame.

Explanation;

Parallel structure also known as parallelism is the repetition of the same pattern of words or phrases within a sentence or passage to show that two or more ideas have the same level of importance.

-Parallelism allows a writer to achieve a sense of rhythm and order. When sentence structures are not parallel, writing sounds awkward and choppy. Parallel clauses are usually combined with the use of a coordinating conjunction.

the apollo program, also known as project apollo, was the third united states human spaceflight program carried out by the national aeronautics and space administration (nasa), which succeeded in landing the first humans on the moon from 1969 to 1972.

jenkins wanted the narrator to write a ghost story for his magazine. he wanted the narrator to give the readers a story based on the supernatural. he wanted him to give the readers real 'horror' stories and not the type of live ghosts which he had presented in his earlier stories.