Answer:
(See answer below.)
Explanation:
The strangers answer adds tension to the rising action by telling the couple of their son's death. After having wished for the money, something grave was taken from them in order to compensate for such a large wish. It was only to their horror when the stranger delivered the news that the paw really worked, but came with great costs.
Well he was aggressive to Lennie when lennie had done nothing wrong towards the middle of the book when they were at the ranch. You could argue that Curley started fighting lennie for laughing then getting his hand broken. If you need more information please feel free to ask, I read this book a few years ago so i can catch up if you need!