Groundwater is recharged naturally by rain and snow melt , hope this helps :)
        
             
        
        
        
Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray Group 2 alkaline earth metal, fifth-most-abundant element by mass in the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.[5] Free calcium metal is too reactive to occur in nature. Calcium is produced in supernova nucleosynthesis.
        
             
        
        
        
The series of events that take place in a cell<span> leading to its division and duplication (replication) that produces two daughter cells. </span>
        
                    
             
        
        
        
Answer: Fighting infection 
Explanation: 
Lymphatic system is a type of circulatory system in all vertebrates. It is a network of tissues ,blood vessels, and organs. The primary function of the lymphatic system is to control the fluid balance by collecting the fluid present in excess from the tissues and depositing them in the stream of blood. The secondary function of the lymph system is the production of lymphocytes (white blood cells) which fights against the disease causing pathogens. Hence, fights against infection.