Asked by Elizabeth Brooks on May 18, 2024

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Which organism is an indicator? 

A)  a cockroach 
B)  a human 
C)  a fly 
D)  trout

Indicator

A measurable variable used to demonstrate the progress toward achieving a specified goal or to assess the condition of a particular aspect of an ecosystem or economy.

  • Acquire knowledge about the signals of environmental health and variations in ecological conditions.
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SA
Seneka AndersonMay 19, 2024
Final Answer :
D
Explanation :
Trout is an indicator organism as it is a sensitive species that can be harmed by even small changes in water quality. Thus, its presence or absence can indicate the health of an aquatic ecosystem.