Answer:
When you breathe in, the diaphragm moves downward toward the abdomen, and the rib muscles pull the ribs upward and outward. This makes the chest cavity bigger and pulls air through the nose or mouth into the lungs.
pls mark me the brainliest
 
        
                    
             
        
        
        
Answer:
- Heart
Step by step explanation:
        
             
        
        
        
When water percolates (or move downward) through openings in soil, it enters and replenishes aquifers under the ground. 
        
                    
             
        
        
        
Answer:
C for the 2nd one
and B for the 3rd one