Answer:
System.
Step-by-step explanation:
Immunity is organised into system levels of organisation because it comprises of different organ, proteins and cells.
The immunity.
The immune system comprises of networks of cells, proteins and organs that in fighting against any invading pathogens entering the body.
The comprises of white blood cells which function as defence mechanism.
The immune system identify any foreign pathogens and distinguish them from the normal body cells and organs then secrete antibodies to fight against it