Answer:
Lifestyle, serious health issues and age.
Explanation:
Health is a right, even though in several countries it's not considered so. when doing a research about health it's important to understand how health is not precisely just the lack of sickness, but instead, it's the complete wellbeing of the person. Therefore, there will be many factors that affect it, nevertheless, the most important one is Lifestyle. Lifestyle may include many other insights, but exercise, eating habits and load of stress should be enough for knowing how the person develops everyday. Then, if the person has any health issues such as diabetes, high blood pressure or a cardiac condition, this will definitely affect the way that the health service should treat the case. And finally, the age also affects the study. It's not the same a baby's health than a grown up or even a elder. This way, age affects severely the study and also provides some important information about the audience in general.
"Of the modes of persuasion furnished by the spoken word there are three kinds. The first kind depends on the personal character of the speaker [ethos]; the second on putting the audience into a certain frame of mind [pathos]; the third on the proof, or apparent proof, provided by the words of the speech itself [logos]. Persuasion is achieved by the speaker's personal character when the speech is so spoken as to make us think him credible."
Ethos (sometimes called an appeal to ethics), then, is used as a means of convincing an audience via the authority or credibility of the persuader, be it a notable or experienced figure in the field or even a popular celebrity.
Pathos (appeal to emotion) is a way of convincing an audience of an argument by creating an emotional response to an impassioned plea or a convincing story.
Logos (appeal to logic) is a way of persuading an audience with reason, using facts and figures.
I need to hurry and go to the library; it will close soon.
