awnser is high concentrations of oxygen
There are many different names for sand dunes, it all depends on the way it looks like there is the reversing dunes and star dunes, parabolic dune, Barchan Dunes,Transverse Dunes, and <span>Nebkha or Coppice Dunes so yes you just got to find out which one it is by looking at the pictures of them </span>
The function of White Blood Cells (WBC) is to defend the body from various infections. They produce antibodies that help detect and fight the presence of foreign elements (say germs) in the body. They strengthen the defense mechanism, thereby improving the immune system of the body against germs
