Answer no copy paste
Homeostasis and thermoregulation
When temperatures are too low, these processes may be disrupted, which can lead to cellular damage and even death. Homoeothermic endotherms, such as bears, bats, and birds, regulate their body temperature by generating heat internally.
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What textbook? Most of their power is from Hydroelectric dams (59% of it)
The abiotic environment consists of non-living things. So, rocks, temperature and water are part of the abiotic environment.