OE


A, E, H Begin with blank (i): these animals use jet propulsion to search for prey and avoid or try to get away from predators. (A) works nicely here and is correct. (B) bifurcate means "to divide into two branches," but that does not describe getting away from predators. (C) dis-semble means "to disguise a true feeling," but cephalopods use jet propulsion to move, not to disguise anything.
The word "although" sets up a contrast between animals, which have used jet propulsion for millennia, and humans. The implication is that humans were not able to use jet propulsion to get around until the internal combustion engine was invented. That can serve as your prediction: "did not 'use' jet propulsion." (E) is a great match for this prediction. (D)fortuitously analyze means "examine by a lucky chance." There is no suggestion of chance playing a role. Moreover, the sentence indicates that the invention of the internal combustion engine allowed humans to use jet propulsion, not just to examine it. (F) rampantly augment means "add to without restraint." This is incorrect because the sentence does not imply that the invention happened "without restraint" or that people "added to" jet propulsion.
The final blank follows from the contrast keyword "although," as well. Animals have used jet propulsion for a long time, and humans were able to use it after the invention of the internal combustion engine. This development of jet propulsion "made a somewhat inefficient method of locomotion 'workable' for many modern applications." (H) matches that prediction. (G) commensurate means "in proportion" and does not match the context of the sentence. (I) sporadic means "scattered," but the sentence does not imply that the internal combustion engine made jet propulsion "scattered."