The sentence that uses parallel structures is B) My three favorite activities are writing, reading, and going to the library.
A parallel structure means that the same form of a verb is used in a sentence, and as you can see, here only gerunds are used - writing, reading, going - they all have -ing in the end.
The other sentences don't have a parallel structure because they don't use the same forms.
B) Information that has been described, analyzed or interpreted by a third party source who was not present.
I hope I helped!
Answer:
<em>In geometry, a coordinate system is a system that uses one or more numbers, or coordinates, to uniquely the position of the points or other geometric elements on a manifold such as Euclidean space.</em>
Discovered is the action verb
