A.I. Explanation:

Option 1: "Civilization must suffer the consequences of self-control and self-denial."

Explanation: This option misinterprets the author's view. The text suggests that civilization can lead to better health if moderation is practiced, rather than suffering from self-control. The phrase 'self-control and self-denial' implies a negative consequence, which contradicts the author's argument that moderation is beneficial.

Option 2: "Unnecessary waste of life is the natural consequence of civilization."

Explanation: This option inaccurately summarizes the author's opinion. The text does not state that civilization leads to a waste of life; instead, it argues that civilization can promote health if people live moderately. The term 'unnecessary waste' is not supported by the text.

Option 3: "People should live in comfort and health beyond what is now considered old age."

Explanation: This option misrepresents the author's stance. The text emphasizes moderation and simplicity rather than advocating for excessive comfort or health beyond current standards. The idea of living 'beyond what is now considered old age' does not align with the author's warning against immoderation.

Option 4: "Life of immoderation is neither natural nor desirable."

Explanation: This option accurately reflects the author's opinion. The text argues that while civilization can promote health, it warns against the dangers of immoderation, which leads to deterioration. The phrase 'neither natural nor desirable' aligns with the author's view that excessive luxury and lack of moderation are harmful.