All of the following are components of wellness except
genetics
stress mastery
nutrition
relationships

There are several dimensions to the wellness that are globally accepted. They are,

*physical, mental, emotional, environmental, occupational, social, intellectual, and spiritual health.

So if we look at your question and try to isolate an option that doesn't fall under any of these categories, you'll see its really difficult or that can't be done.

Genetics and nutrition falls under physical wellness. Stress mastery goes under emotional health and relationships go under social wellness.

Are you sure these are all the options?

Explanation:

in terms of experimental research, mcdonald’s charging different prices in the two cities relates to