Answer:
D) Chromosomes can align in metaphase I in multiple possible arrangements in a process called independent assortment. 
Explanation:
 
        
                    
             
        
        
        
A. Skeletal and muscular 
the other three don’t have to do with this type of internal movement though as the abdominal region and internal organs don’t have to do with this, A is the only possible answer
        
                    
             
        
        
        
Air pressure (inside the lungs) is lowest when lung volume is highest, so the answer is B. when you breathe in your lungs expand, which makes the air molecules spread out, therefore the pressure is lower.
        
                    
             
        
        
        
Flowering plants produce male and female cells. The male cells are called pollen and the female cells are called ova. When a flowering plant is fertilized, it produces offspring in the form of seeds. However, not all plants reproduce flowers. Simpler plants, like mosses, lack these specialized structures.
        
             
        
        
        
I think it is the blood vessels ???