Question

obesity experts called the harvard findings important and praised the study for being prospective. in other words, the harvard researchers spent 19 months following the children, rather than capturing a snapshot of data from just one day. its considered statistically more valuable to conduct a study over a long period of time.
researchers found that schoolchildren who drank soft drinks consumed almost 200 more calories per day than their counterparts who didnt down soft drinks. that finding helps support the notion that we dont compensate well for calories in liquid form.
how does the author appeal to logos in the passage above?
by presenting specific numerical information to support the argument
by stating that the study came from harvard university
by using children to appeal to readers emotions
by making a strong conclusion after presenting a research

Explanation:

Logos is an appeal to logic, often using facts, data, or numerical information. In the passage, the author presents specific numerical information like "19 months" (duration of the study) and "almost 200 more calories per day" (difference in calorie intake between children who drank soft - drinks and those who didn't). These numbers are used to support the argument about the relationship between soft - drink consumption and calorie intake.
Stating that the study is from Harvard (an appeal to ethos, credibility of the source) is not an appeal to logos. Using children to appeal to emotions is pathos, not logos. Making a conclusion after presenting research is a general structure of an argument but not specifically an appeal to logos unless the conclusion is based on logical (numerical or factual) reasoning. Here, the key is the presentation of numerical data.

Answer:

By presenting specific numerical information to support the argument.