Can someone please help me with 33,34

For number 3 I think it’s b
Because extending in the same direction, equidistant at all points, and never converging or diverging: parallel rows of trees. having the same direction, course, nature, or tendency; corresponding; similar; analogous: Canada and the U.S. have many parallel economic interests.

D

Parallel structure (also called parallelism) is the repetition of a chosen grammatical form within a sentence. By making each compared item or idea in your sentence follow the same grammatical pattern, you create a parallel construction. Example Not Parallel: Ellen likes hiking, the rodeo, and to take afternoon naps.

Sorry if I’m wrong :/