Many biologists consider amphibians to be "canaries" for the global environment. What features of amphibian biology make them especially sensitive to or indicative of environmental disruption?
A) They have narrow environmental tolerances.
B) They exchange gasses through their skin.
C) They are preferred prey species in both their aquatic and terrestrial life stages.
D) They are found only in remote habitats far from direct human disruption.
Correct Answer:
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