1. Frequency  is the number of complete waves that pass a point in a second.   2.Wavelength is the distance between two crests or two troughs.                     3.Time period <span> is the time it takes for one complete wave to pass a given point. 4. Amplitude is the height of the wave.   Hence option 4 is correct. </span>
        
             
        
        
        
When a red giant has insufficient mass it pretty much sheds its outer layer to leave the center core know as the white dwarf
        
                    
             
        
        
        
Build a filter.
Dig water from the ground
        
             
        
        
        
D. between radio waves and microwaves