If you could give advice to King Duncan about going to Macbeth's home, what would you say?

I would mainly say never let down your guard

Explanation:

I would say never let down your guard, be strong, and watch your back.

Explanation:

the flighty purpose never is o'ertook / unless the deed go with it"

i believe it is the first choice (1.)

because the major theme is(“both the wild and civilization have rules.”)

and also as u said,( based on what buck learns within the call of the wild, "both the wild and civilization have rules".this is true of humans within society as well.