Question

the bodys natural defense system against infection is called the response.

Explanation:

To determine the correct term, we analyze the options: "aerobic" relates to oxygen - requiring processes, "anaerobic" is about processes without oxygen, "systemic" refers to something affecting the whole body. The body's natural defense against infection is the "immune" response, as the immune system defends against pathogens.

Answer:

D. immune (Note: Assuming the options are labeled with letters, if not, the correct option is "immune" from the dropdown list.)