The correct answer that best analyzes how the parallel plot creates tension is:
D. The parallel plots describe two unrelated characters who will likely interact in the same setting with an unknown form on the beach.
This choice captures the essence of the tension created by having two characters—Ji and Asher—engaged in their individual activities, both drawn to the same location at the beach where something mysterious awaits them. The anticipation of their potential interaction, combined with the unknown element on the beach, builds suspense and highlights the contrasting experiences they are having while leading towards a possible convergence. The uncertainty about what the massive form is, and the fact that both characters are approaching it from different perspectives adds to the tension, as readers become eager to see how their stories will intersect.