Answer:
supplying oxygen to cells and tissues. providing essential nutrients to cells, such as amino acids, fatty acids, and glucose.
Explanation:
it jus makes sure that we get oxygen to our cells and tissues so we dont die.
 
        
                    
             
        
        
        
Aero is the prefix for oxygen or air 
Aerobic= needs air 
Anaerobic=no air needed
        
             
        
        
        
The correct answer is low precipitation.
The cause of limited water supplies is reduced precipitation or low precipitation.
 Precipitation is termed as any product of condensation which is of atmospheric water vapour which falls under gravity.
Forms of precipitation can be sleet, snow, graupel, hail, drizzle, and rain.
Precipitation occurs when portion of atmosphere comes to being saturated with water vapor such that water condenses and then it precipitates.
It is the major component of water cycle and deposits fresh water to planet.
 
        
                    
             
        
        
        
The correct answer is A. This is because undeveloped meaning they don't have access to any of the other offered answers