The chemical substance is a nutrient
I believe the answer is D. Unintentional/preventable
<span>The answer is letter A.<span>
<span>Congestive
heart disease and asthma are examples of chronic conditions. Chronic diseases
refer to diseases that have lasted for three months or more. It cannot be
prevented by vaccines, cured by medications, and they do not just disappear. It
requires medical attention and proper care. Congestive heart diseases (CADs)
usually appear in many forms, the common ones are arteriosclerosis (hardening
of the arteries) and atherosclerosis (blockages in the blood vessels). While
asthma is a disease that is hereditary and can worsen when exposed to different
environmental pollutants (e.g. smoke, extreme cold).</span></span></span>
