The answer is letter
D.
<span>
Communicable diseases
are also known as infectious or contagious diseases. They may come from food,
water, animals, another person, or anything that comes from the environment. <span>Airborne
viruses, bacteria, blood, and bodily fluids can cause the spread of these
diseases. The most common communicable disease is the flu, which can easily
spread in an enclosed environment with a recycled circulating air (e.g.
air-conditioning). Infectious disease caused by blood contact like HIV/AIDs are
also dominant in society.   </span></span>
        
             
        
        
        
Answer:
Anxiety is a normal reaction to stress and can be beneficial in some situations. It can alert us to dangers and help us prepare and pay attention. Anxiety disorders differ from normal feelings of nervousness or anxiousness, and involve excessive fear or anxiety. Anxiety disorders are the most common of mental disorders and affect nearly 30 percent of adults at some point in their lives. . But anxiety disorders are treatable and a number of effective treatments are available. Treatment helps most people lead normal productive lives.
Explanation:
hope that helped :)
 
        
             
        
        
        
"Use the settings of the machine to decrease the intensity" is the one among the following choices given in the question that he should o the next time he uses this machine to get the most effective workout. The correct option among all the options that are given in the question is the second option or option "B". 
        
             
        
        
        
The stage of illness during which a person regains normal health status is the <span>convalescent period</span>
        
                    
             
        
        
        
If an example is what you need i'll try my best to help. Say for example, you're sitting in class and you're doing a group project and you want your best friend to do it with you but (s)he thought you had meant that you wanted to do it with someone else, because of poor body or facial language. 
Does this help at all?...