Answer: Option B ( PREVALENCE)
Explanation:
While Endemic has to do with consistent presence of a disease or it's agent in a population;
An Epidemic describes a sudden increment in the amount of cases of a disease beyond or above the expected level of that disease within a specific population in a particular geographical location.
Sporadic is used for the description of a disease that does not occur frequently.
Pandemic is used in reference to an epidemic that has dispersed to many nations or even continents, and affecting so many people.
A prevalence is a term that describes the proportion of people in a given population that currently has a part disease. It also may simply be seen as a statistical representation that reveals the amount of a disease that's present in a population at a particular period.
Incidence refers to the quantity or amount of new cases of a particular disease that surfaces in a given population at a particular period
Summarily, if 600 out of 8000 young women tested positive for an STI; the best term to describe this development is a PREVALENCE - which is a description of the proportion of people in a population that have a disease