I believe it's the body area examination, since a 'back' isn't and organ
Hope this helpss
When the cell engulfs large fragments of matter, it is called phagocytosis. The correct option among all the options that are given in the question is the fourth option or the last option. It is basically a process through which certain living cells by the name of phagocytes engulf other cells or particles. I hope it helps you.
