Answer:
1 c. pulmonary artery
2 c. capillary
3 d.90%
4 none of them its white blood cells aka leukocytes
5 artery
6 artery
7 d fights the infection 
8 a form wounds scabs and clots
 
        
             
        
        
        
Answer:
Vaccines stimulate the body's own immune system to protect the person against subsequent infection or disease." ... The immune system develops antibodies to the disease so that it cannot make you sick again. Immunization describes the actual changes your body goes through after receiving a vaccine.
 
        
                    
             
        
        
        
Answer:
When carbon dioxide dissolves in seawater, the water becomes more acidic and the ocean’s pH (a measure of how acidic or basic the ocean is) drops. Even though the ocean is immense, enough carbon dioxide can have a major impact. In the past 200 years alone, ocean water has become 30 percent more acidic, faster than any known change in ocean chemistry in the last 50 million years.
Explanation:
 
        
             
        
        
        
The energy-rich compound needed by organism is : Carbohydrates
Carbohydrates consist of the combination of the existing Carbon, Hydrogen, and Oxygen alone.
For human, The source of carbohydrates could be found in almost every food, but the huge amount could be found in rice, potato, corn, cassava, oatmeal, etc
hope this helps