The biological explanation for the correlation between optimism and physical health focuses on risky behaviors and adrenaline.
<h3>What is Physical health?</h3>
This is defined as the well being and the proper functioning of the body system of individuals and can be improved through good food and exercises. This ensures the appropriate nutrients are made available to the body for various metabolic reactions.
The exercises on the other hand helps to increase blood flow which contains oxygen and other compounds to other parts of the body. Optimism in individuals is usually brought about by the hormone known as adrenaline while risky behaviors such as smoking, drug abuse can lead to a decline in physical health.
This is therefore the reason why it was chosen as the most appropriate choice.
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The answer is source B because it has a listed author who is an expert and it is the governments organization website which are more reliable that a .com website. Source A does not even list the author so you do not know who wrote it could be anyone.