For the last two weeks my 11 year old son has been experiencing nausea and vomiting in the mornings on school days in particular. The first week I believe he had a virus because he was vomiting and dizzy and I had the same thing for that week. That weekend he seemed fine, eating spaghetti,ice cream and so on but Monday morning he was throwing up again. I got a call from the school nurse saying he was in her office wanting to come home. He is throwing up but I don't know what the heck. I have tried eliminating meds, foods and so on and trying to find out if something was going on at school that he was trying to avoi
        
                    
             
        
        
        
Answer:
b) Cardio respiratory 
Explanation:
Just as exercise strengthens other muscles in your body, it helps your heart muscle become more efficient and better able to pump blood throughout your body. This means that the heart pushes out more blood with each beat, allowing it to beat slower and keep your blood pressure under control. Aerobic exercise boosts your good cholesterol (HDL), and lowers your bad cholesterol (LDL). 
Hope this helps ya! Best of luck <3
 
        
             
        
        
        
Explanation:
Measurement system, any of the systems used in the process of associating numbers with physical quantities and phenomena. Although the concept of weights and measures today includes such factors as temperature, luminosity, pressure, and electric current, it once consisted of only four basic measurements: mass (weight), distance or length, area, and volume (liquid or grain measure). The last three are, of course, closely related.
 
        
             
        
        
        
Answer: They are extremely Optimistic.