According to the Greek philosopher Socrates the key ethical question is

How should one live?

Explanation:

The options for this question are missing. The options are:

What have I been taught to do?

How should one live?

What are the laws of my society?

Whom can one trust?

Socrates was a Greek philosopher who lived around 470 B.C  in Athens, he is considered the father of many subjects, Ethics being one of them.

Socrates never wrote a book but we know more about him and his thought thanks to Plato who wrote books in which he recreated the conversations his teacher would have with people in Athens.

The core question of his philosophy was "What ought one to do?", according to him if a person knows what is good, then the person will always do what is good.  Thus, the goal of his philosophy was the pursuit of knowing what was good in order to live a good life. Thus, the key ethical question of him was "How should one live?" because a person who act in a good way would have a good better life than someone who didn't do this.

answer: (fluidity)is the correct answer.

explanation: because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions

after the french-indian war.