Answer: organism
Step-by-step explanation:
Cell is the basic unit of heredity. The body is made up of specialized cells. Red blood cell,white blood cell,prokaryote and eukaryotes
Cells comes together to form body tissues such as epithelia tissue,phone,xylem tissues.
Organ are group of specializes tissue coming together and performing similar function example is leaf, stem,vine,heart, brain
System are group of organs coming together to perform a particular task example is the digestive system, nervous system
System comes together to make the entire organism example is human, bacteria,fungi.