The sentence that contains parallel structure is "There is education in reading, joy in playing, and fulfillment in learning," as stated in option D.
A parallel structure is a grammatical structure that appears more than one in a sentence. The use of parallel structures is also called parallelism. Its purpose is to make the sentence more organized and easier to understand.
We find the use of parallel structures in the sentence "There is education in reading, joy in playing, and fulfillment in learning." The grammatical structure being repeated is noun + in + verb with -ing:
With the information above in mind, we can choose option D as the correct answer.
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