Macduff's son is a character that even though, his age is not stated in the play, is assumed to be young. The killing of this young character and especially the way that happened shows Macbeth's kingdom cruelty. The murderers call this boy "Egg" while he tried to defend himself and defend his mother who was later killed too.
Old Major's instruction is given in chapter one during the meeting in the old barn. All the animals have assembled to hear what he has to stay. The key point of his directive is that the animals should rise up against Man and be rid of him forever.
I think the answer is A-Features
