Astronomers use light years to measure distances in space because space is so massive and distances so far that conventional numbering is inadequate and unmanageable. One light year is a distance measurement equivalent to six trillion miles.
        
                    
             
        
        
        
Answer:
C. Constant supplies of freshwater are needed because body water is continually being lost. 
 
        
             
        
        
        
D bc the product u using was used b4 so if something is used b4 den u cnt use it again
        
             
        
        
        
Answer: The shoot grows up towards the sunlight is Positive Phototropism
The root grows down the soil is Positively Geotropism / positive gravitropism. 
happy to help again :)
 
        
                    
             
        
        
        
When your out of breath or when your heart rate is really high.