<p>Because insect communities serve as a sort of barometer, (. )conditions in their (. ),an entomologist’s analysis of the insect species in a handful of soil can reveal much about the ecosystem.
A: preserving. habitat
E: registering. environment
(I have already eliminated the other choices, the answer is E, but registering doesn’t make sense to me.)</p>
<p>What does a barometer do?</p>
<p>Does it (A) preserve things? or (B) Register things.</p>
<p>(B) certainly is better</p>
<p>“Register” has a meaning of indicating the measured result on a meter.
ex: The thermometer registered 130 degrees.</p>
<p>Maybe this interesting article would help you better understand the question.</p>
<p>[Barometers</a> of environmental change - Community - Living - The Guardian](<a href=“http://www.theguardian.pe.ca/Community/2010-03-18/article-1371596/Barometers-of-environmental-change/1]Barometers”>http://www.theguardian.pe.ca/Community/2010-03-18/article-1371596/Barometers-of-environmental-change/1)</p>