Final answer:
The true statement among the diet myths discussed is that trans fat is not a type of unsaturated fat, but an unhealthy fat present in many processed foods. The claim that all desserts are low fat is false, as desserts can vary in fat content. Essential nutrients are those that the body cannot produce and must be sourced from food.
Step-by-step explanation:
The subject of the student's question involves debunking diet myths and identifying true statements about nutrition and foodborne diseases. Looking at the statements given in Argument 2, the logical conclusion made is a common fallacy. Just because some sweet foods are low fat does not mean all desserts are low fat, as desserts can vary greatly in their fat content. Thus, the statement "All desserts are low fat" is a myth.
Regarding the questions about the nature of trans fat and bulimia nervosa, the true statement is that trans fat is not a type of unsaturated fat but is instead a type of unhealthy fat often found in processed foods. Bulimia nervosa often involves vomiting to purge food from the body, but it can also involve other methods such as excessive exercise or the use of laxatives and diuretics, so saying it always involves vomiting is a myth.
The best definition of essential nutrients is that they are substances the body cannot make on its own and must be obtained from food. Essential nutrients include vitamins, minerals, essential fatty acids, and essential amino acids.