Answer:
Fourth Statement
Explanation:
Positive feelings can boost the immune system and improve health behaviors.
That is why doctors dont want sick people to be bother about there health issues, they tend to encourage them to think positive, act positive and live positive. when you have positive mindset, you tend to make positive impact to your surrounding environment and this helps to build your confidence and aids a positive lifestyle which is similar to positive health system.
So yes Positive feelings can boost the immune system and improve health behaviors.