What is the term for the use of an animal to spread an organism from one person or place to another?

The correct term for the use of an animal to spread an organism from one person or place to another is vector-borne transmission. This concept refers specifically to the process in which pathogens are transmitted through vectors, such as mosquitoes or ticks, to humans or other animals. These vectors can carry diseases and facilitate the movement of infectious agents between hosts.

This term is central to understanding how certain diseases are spread in public health and epidemiology. For instance, malaria is transmitted through the bite of infected Anopheles mosquitoes, demonstrating how vector-borne transmission works in practice.

The other choices represent different concepts: endemic refers to the constant presence of a disease within a geographic area, while an epidemiologist is a professional who studies the distribution and determinants of health-related states. A functional disorder is a medical condition that affects how a body part works without causing any structural or anatomical problems. Each of these options pertains to different aspects of health and disease but does not describe the mechanism of disease transmission through animals effectively.