Concept:Homeostasis is the biological process by which a mammal keeps its internal environment stable and balanced.
Explanation:The internal environment of a mammal includes body temperature, water balance, blood glucose, and pH levels.
For cells to function properly, these conditions must be kept fairly constant.
Homeostasis is achieved through self-regulating feedback mechanisms that detect changes and trigger corrective responses.
For example, when the body becomes too warm, it sweats to cool down, restoring the normal temperature.
This coordinated control is the hallmark of homeostasis.
Now, let us consider the other options.
Osmosis only refers to the movement of water through a semi-permeable membrane.
Plasmolysis is the shrinkage of a plant or animal cell due to water loss.
Excretion simply means the removal of metabolic waste products from the body.
None of these terms describes the overall maintenance of a stable internal environment.
Therefore, the correct term is homeostasis.
Answer:C. homeostasis