There are two accepted forms for possessive singular nouns ending in "s". You can either put cactus' , or you can put cactus's.
It seems that you have missed the given choices for this question, but anyway, here is the answer. In Macbeth, the message the Lennox wants to sent to Macduff is that He and Malcolm are in grave danger. <span>When Macbeth arranges the murder of his wife and children, </span>Macduff<span> swears personal revenge. Hope this answer helps.</span>
Idk need more context bud
Hmm I'm guessing he's basically the one with the power and the money to say things, or maybe he owns something big or something that is used everyday. Maybe, he's just respected by everyone and will understand what you have to say.