So in process one of step two, we have a dehydration reaction. Why? Well, because we want to basically remove this hydroxyl group. And in addition, we remove this H to form the water molecule and form the double bond between this carbon and this carbon here. And once we form this double bond, this water molecule that comes in in step two will basically undergo a hydration reaction. The water will act as a nucleophile, and instead of attacking this carbon, it will attack this carbon.