What are the primary protective agents involved when a client is invaded by extracellular microbes?

Answer;

-Antibodies

Explanation;

-Antibodies, also known as immunoglobulins,are large Y-shaped proteins produced by B- cells and used by the immune system to identify and neutralize foreign objects such as bacteria and viruses. Antibodies are produced by B cells, and are either secreted into circulation or remain expressed on the surface of the B cell.

-Circulating antibodies are produced by clonal B cells that specifically respond to only one antigen. Antibodies contribute to immunity in three ways: preventing pathogens from entering or damaging cells by binding to them; stimulating removal of pathogens by macrophages and other cells by coating the pathogen; and also triggering destruction of pathogens by stimulating other immune responses such as the complement pathway.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."