Finding Errors in a Comprehension Homework

The language used in the text tries to shock the young children into becoming vegetarians by telling them how cruel they are treated by the offspring taken away so early. There were also the use of unpleasant words such as 'killed and cruel'. I was asked to find out what was wrong with this answer that was given by another student in a 'factory farming vegetarian leaflet' but I don't understand what the teacher meant.