In what temperature range do thermophilic organisms grow optimally?

Thermophilic organisms thrive in high-temperature environments, typically characterized by an optimal growth range. The correct choice indicates that these organisms grow best between 122℉ to 140℉. This temperature range supports the metabolic activities of thermophiles, allowing them to efficiently break down organic matter in environments such as composting systems and certain wastewater treatment processes.

These organisms are crucial in aerobic and anaerobic digestion processes because their enzymatic activity enables the degradation of complex biomaterials, effectively speeding up the treatment of wastewater. Their ability to function at high temperatures is significant as it can help reduce pathogens and produce stabilized biosolids.

In contrast, the other temperature ranges presented depict conditions that either fall outside the optimal growth parameters of thermophiles or correspond to organisms with different thermal tolerances, such as mesophilic or psychrophilic organisms. Therefore, the identified range accurately reflects the environmental conditions under which thermophilic organisms flourish.