Final answer:
Morbidity rates refer to the number of disease cases within a population, expressed per standard portion of the population, and indicate disease prevalence rather than mortality rate, life expectancy, or health promotion.
Step-by-step explanation:
Morbidity rates refer to the number of cases of a disease expressed as a percentage of the population or per standard part of the population, such as per 100,000 people. These rates illustrate the occurrence of illnesses within a given population during a specific period of time. Morbidity rates are a crucial component of public health data, often reported through the Morbidity and Mortality Weekly Report (MMWR) compiled by the CDC to track public health trends.
The correct answer to the question 'What is morbidity rates?' is A. Disease Prevalence, which represents the number of individuals with a particular illness in a given population at a certain time. It differs from mortality rate, life expectancy, and health promotion, which measure the number of deaths, the average expected lifespan, and the efforts to improve health, respectively.