Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

The surface type of this process can happen to encapsulated bacteria after they are attached to a blood vessel. In other cases of it, bacteria are covered with proteins, allowing other molecules to adhere to them. The granules of neutrophils can begin this process, which is completed by hydrogen peroxide and superoxide. Leukocytes, or white blood cells, also use this process to protect the body from bacterial infections. Name this process also carried out when protists use their cell membranes to ingest nutrients, a form of endocytosis [en-doh-sy-TOH-sis].
Social Science