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Which of the following loads does not require a grounded circuit conductor?
Indicator Species
Species that reflect the ecological condition of an environment, often used to monitor environmental health or pollution levels.
Extinct
A status describing species that no longer exists anywhere on Earth.
Amphibians
Cold-blooded vertebrates that include frogs, toads, salamanders, and newts, known for their ability to live both in water and on land during different life stages.
Atmospheric CO₂
The concentration of carbon dioxide in Earth's atmosphere, a crucial factor influencing climate change and global temperatures through the greenhouse effect.
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