The life processes need to do:

(i) To provide food that provides energy and material required to sustain life. The process is called nutrition.
(ii) Respiration to supply oxygen to break down food (especially glucose) in the cells of organisms to release energy.
(iii) Transportation process for carrying food and oxygen from one place to another in the body. Also to transport wastes from body cells to excretory tissues.
(iv) Excretion process that removes the by-products produced during other life processes and carried to excretory tissues.