Which process must occur in multicellular organisms

The  process  which  must  occur  in  multicellular  oraganism  include   the  following
1.   cell  division-  this   occur  by  use  of  series mitosis  division 
2  cell  differentiation;the  divided  cells  specialize  into  structure  and  function
3.morphogenesis;cell   create  their  physical  arrangement  which  are  organized  and   distributed non  randomly  in  an  organism

If you eat to much it could kill you.