Some themes for this could be a cliche like "All life is precious" and if you watch "The Walking Dead" on AMC, you know Morgan the actor refuses to kill humans because he believes they can change to good people. Another theme could be "All things deserve life"
Let me just check I’m already done this work
Break it up before something bad happens
D., Life. Since it is a more vague word and its meaning carries more weight than the others, I would say it has the most connotative associations.