Where is the excerpt from the story?
Benevolent and Kindhearted are similar in meaning, kindhearted is typically defined as having a kind nature whereas benevolent is typically defined as being kindly.
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.
