Q.

Sensors can be used a: to monitor conditions and movements of wild animals or plants in wildlife habitats b: to monitor air quality and track environmental pollutants, wildfires or other natural or manmade disasters c: to monitor biological or chemical hazards to provide early warnings d: to monitor earthquake

A. a b c
B. a b c d
C. a c d
D. b c d
Answer» B. a b c d
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