B., “the bends” is known as decompression sickness that occurs in scuba divers when dissolved gasses come out of the solution in the bloodstream, forming gas bubbles in the circulation. this relates to the paragraph above.
I believe the best answer for this question is "entropy." Entropy is a scientific term referring to thermodynamics. It measures both the order and the disorder of a system. Order, or disorder, are both defined by how close the system is to equilibrium. Hope this helps. Also, keep in mind to ask questions in the proper category - this would be most suited to science, rather than English. Thanks.
Plot : What is the sequence of events in the story?
Characters: What do we learn about the boy whom the story is about?
Point of View: Is the boy telling the story or is an outside narrator telling the story?
Theme: What does the author want us to learn from the story?
Setting: Where does the boy live?
