Answer:
The correct answer is "The drivers found the camels ugly and often grumbled about their smell and how the camels spat at them and sometimes bit them".
Step-by-step explanation:
An informational piece of writing with a formal tone is used for communication among professionals dealing with important situations. For instance, a historian trying to make a summary of her or his findings to the institution that paid for the trip. A formal tone involves showing respect to the audience and having seriousness about the given information. The third sentence is not written using a formal tone because words such as "ugly", "grumbled" and "spat" must be changed to sound more polite and professional.