What is in milk

Grass is made of vitamins A and B.When it rains the grass gets wet and then the cows eat the
grass and the milk in the cow mixes with water.When the cows get milked the milk truck comes and takes it to the milk factory.Then they mix the milk with butter and clean the milk so it is ok for us to drink.When they have done that they put the milk in milk bottles and send it to the super market and they put prices on them and they sell the milk.