Answer:
Hi! Your answer here is D. environmental factor. Being unable to play tennis due to extreme heat is an example of an environmental factor because the natural heat is preventing you from playing tennis. It is not a cost or equipment factor because it has nothing to do with either category. This is also not a personality factor because, though some people may naturally deal better with heat than others, that's influenced more by their location (example: California vs. Maine) than by their personality.
One positive example of health fitness advertisements would be advertisements that get you to come to the gym to work out.
A negative example would be dieting pills that make it seem like you don't have to put in any work to lose weight healthily.
D. Increased intake of sodium.
Helps with not making you sick or have mood swings
