In a region with a low crude birthrate, a high crude death rate is most likely indicative of

an aging population.
a lack of health care.
a high infertility rate.
a lack of food and water.
an infertile population.

A lack of food and water and a lack of health care.

Explanation:

Infant mortality rate is the quantity of passing's of babies under 1 year of age for every 1000 live births in a given year. Intensely affected by key enhancements in personal satisfaction factors, for example, water supply, nourishment and human services.

Unrefined birth rate is the most fundamental proportion of fruitfulness. The word 'unrefined' implies that the birth rate applies to the absolute populace, failing to assess sexual orientation and age.

The rough birth rate is intensely impacted by the age structure of a populace.