I'm happy to go over why (B) is incorrect and why (C) is correct.
The question says, "Which one of the following strategies is most similar to Scheich’s experimental strategy as it is described in the passage?"
Scheich's method is outlined in the second paragraph of the passage. In Scheich's experiment, he used a battery in order to mimic the electrical fields produced by freshwater shrimp. The correct answer choice will likely be one that involves a simulated reproduction of some sort of biological process in an animal.
(B) says, "To determine whether certain animals find their way by listening for echoes to their cries, a biologist plays a tape of the animals’ cries in their vicinity."
The issue with (B) is that Scheich never created tape recordings of the platypus making noises, nor did he tape record the shrimp. In order for (B) to have been the correct answer, we would have needed it to say something like, "Scheich tape recorded the platypus to see if it found its way by listening to echoes of its cries." This isn't anywhere in the passage, and this is far different from the experiment Scheich carried out, so (B) is out.
(C) says, "To determine whether an animal uses heat sensitivity to detect prey, a biologist places a heat-generating object near the animal’s home."
As noted above, the question is asking us to pick an answer choice that shows an experimental strategy that mirrors the strategy that Scheich used, which is described in the second paragraph of the passage. Also as noted above, Scheich used a battery in order to mimic the electrical fields produced by freshwater shrimp. The correct answer choice will likely be one that involves a simulated/mechanical reproduction of some sort of biological process in an animal. (C) does this well, as the heat-generating object is analogous to the battery Scheich used. Determining whether an animal uses heat sensitivity to detect prey is analogous to Scheich determining whether or not a sensory system based on electroreception similar to that found in sharks exists in the platypus. (C) matches up really well, so it's the correct choice.
Does this make sense? Let us know if you have any more questions!
