Question

Read this sentence:

Escaping the pull of gravity and to travel at high speeds both affect the rate at which time passes.
Which revision of the sentence uses parallel structure?

A. Escaping the pull of gravity and traveling at high speeds both affect the rate at which time passes.
B. Escaping the pulling of gravity and to travel at high speeds both affect the rate at which time passes.
C. Escaping the pull of gravity and to travel at high speeds both affect the rate at which time passing.
D. Escaping the pull of gravity and to travel at high speeds both affected the rate at which time passes.

Answer 1

The correct answer is A!

Answer 2

The correct answer is A. Escaping the pull of gravity and traveling at high speeds both affect the rate at which time passes.
If a sentence has parallel structure, it means that some of the words in it have the same form. In sentence A, as you can see, the words escaping and traveling both have the form of gerund (verb + -ing), therefore they have the same structure, thus making this sentence a parallel one.