Answer: It is called phagocytosis.
Step-by-step explanation:
Phagocytosis is a process whereby some cells called phagocytes use their plasma membrane to engulf large particles which lead to death and decomposition of the engulfed material for nutrients or as a form of immune response. Examples of living cells that undergo phagoctosis is Amoeba( for nutrition) and white blood cells in multicellular organisms as a form of immune response against pathogens.