Answer:
The correct answer is: The complement system.
Step-by-step explanation:
-The complement system can also be known as the complement cascade is one of the fundamental components of the system that helps the organism defend from pathogen agents.
-It is known as the complement system because it helps antibodies in the task of clearing microbes and damaged cells, and attacking pathogen agents.
-The complement system is a part of the inmune system as is brought into action via activation of the adaptive inmune system.
In conclusion, the complement system is a contributor to both innate and humoral inmunity that requires sequential activation.