Final answer:
The one force from which man is not immune is fear. The Chorus in the provided passage discusses the laws of changeless justice and the inevitability of fate in Sophocles' tragedies, emphasizing that fear is an inescapable force.
Step-by-step explanation:
The one force from which the Chorus notes that man is not immune is Fear. In the passage provided, the Chorus speaks about the laws of changeless justice that bind both the oppressor and the oppressed. It emphasizes that there is no escape from this force, whether through the law of man or God. This is further supported by the mention of the inevitability of fate in Sophocles' tragedies, where human heroes face the consequences of their actions.