Concept:Egestion is the process by which undigested food remnants are removed from the body as faeces.
Explanation:After digestion, some food materials are not digested or absorbed by the body.
These remnant particles collect in the rectum and form faeces.
The body removes these faeces through the anus in a process called egestion.
Egestion is different from excretion, which removes metabolic waste products from the blood and cells.
Assimilation is the use of absorbed nutrients by body cells, so it is not the removal of remnants.
Elimination is a general term for waste removal, but egestion specifically refers to undigested food particles.
Therefore, the removal of remnant particles of digestion is correctly called egestion.
Answer:The correct option is B. egestion.