Diffusion in the Human Body<span>. Digested particles of food diffuse in the colon. Oxygen in the lungs diffuses from the alveolar air space into the blood circulating around the lungs. Carbon dioxide diffuses from the blood circulating around the lungs into the alveolar air space.</span>
        
                    
             
        
        
        
All the above would be classified as safety rules
        
             
        
        
        
Answer:
a) The Sun is one of many stars in the Universe.
Explanation:
The Sun is one of many stars in the Universe, as there are 200 billion stars in our galaxy alone. Therefore, option (a) is the correct answer.
 
        
                    
             
        
        
        
Answer:
Control variables are the one gallon of gasoline, the Car, and the route.
Independent Variable: Gasoline
Dependent Variable: MPG's
Explanation: