Question

what is an endemic?
the ongoing, normal level of a disease within a population.
an increase, often very sudden, in the number of cases of a disease.
illness that is contained to one certain country or continent.

Explanation:

To determine the correct definition of an endemic, we analyze each option:

• The first option: "The ongoing, normal level of a disease within a population" matches the definition of an endemic, as an endemic disease is one that is regularly found at a consistent (normal) level in a particular population.
• The second option describes an epidemic (a sudden increase in disease cases).
• The third option is incorrect; a disease confined to a country or continent isn't the definition of endemic (endemic relates to a stable presence in a population, not just geographic confinement).

Answer:

A. The ongoing, normal level of a disease within a population.