2. Which of the following statements most correctly defines homeostasis? A. All living organisms are alike. B. Living organisms do not change much over time. C. Human beings and other animals acquire materials and energy when they eat food. D. It takes energy to maintain the organization of the cell. E. Cells and organisms maintain a fairly constant internal environment.

The correct answer will be option E.

Explanation:

All living organism show characteristic features which distinguish them from non-living things.

Homeostasis is one of the features of the living organism performed by the living organism which is the ability of an organism to maintain the internal environment irrespective of the external environment.

The internal environment is greatly influenced by the temperature and intensity of light in the response of which animals or plants show response.

Animals shiver in the cold which generates the energy in the form of heat to maintain the internal temperature and perspiration takes place in summer to cool down the body.

Thus, option E is the correct answer.