The correct answer is B.
An environmental factor refers to an external influence present in your environment, so in this case it would be poverty. Poverty can contribute to mental illness as it can be very emotionally as well as physically destructive to live in poverty. Also those living in poverty are least likely to get any help for their health as they are unable to. Intelligence and high self esteem would be personality/cognitive factors and a supportive family would be a social factor.
Have allgeries or throw up
The correct answer would be A. to avoid unhealthy products.
The question asks which is the best health reason to learn about advertising techniques therefore this answer is the correct one. If you know how advertising works and all the tricks and tactics employed then you will know which products to avoid and which ones are actually beneficial and good for your health.
Answer: A:Running on a track for 30 minutes