Final answer:
Multicellular parasites are most effectively cleared by type 2 immunity, which involves cells that release factors toxic to parasites and promotes their expulsion from the body.
Step-by-step explanation:
Multicellular parasites are most effectively cleared by type 2 immunity.
Type 2 immunity involves cells containing cytoplasmic granules that help mediate immune responses against parasites. These cells, such as eosinophils and mast cells, release factors that are toxic to parasites.
This type of immunity is commonly seen in response to helminth worm infections, and it is characterized by the production of IgE antibodies and an inflammatory response that promotes the expulsion of parasites from the body.