- Fri Dec 02, 2016 6:36 pm
#31145
Hey there Chica, sorry to take so long to get back to you on this one.
The problem we are trying to resolve here is that the temperature inside the caves stay pretty much constant, and yet more bats go out to hunt when it is warmer outside and there is more food flying around. How do they know it's warmer outside when their cave temperature hasn't changed? We need to find the source of their knowledge about the outside temp, and answer B provides it - they sense pressure changes that tell them about the temp because of a correlation with the temp. It's like knowing that it's cold outside not because you can feel it in your nice warm house, but because you see frost on the windows.
C and E don't explain how the bats know to go out hunting when it's warmer. C tells us only that if they go out in the cold they won't last long, but gives no indication about how they know about the temp before they get outside. E tells us nothing at all about variations in temperature and what bats might know, just that most of them went out hunting during the study.
Does that clear it up? Hope I helped!
Adam M. Tyson
PowerScore LSAT, GRE, ACT and SAT Instructor
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