There is considerable variation by country in the distribution of causes of deaths among adults in the typical reproductive ages, with deaths due to which of the following being common in low-income countries and rare in high-income countries?
Infectious Disease
Viral disease
accidents

Infectious diseases

Explanation:

Infectious diseases are cause by pathogens. These pathogens are micro-organisms(microbes) and can’t be seen by the naked eye except through varying types of microscope. These pathogenic microorganisms are divided into 4 which include Bacteria, Fungi, Virus and Protozoa.

These infectious diseases are high in low-income countries because a low economy is a characteristic of a developing or underdeveloped country. These countries are usually characterized by Poverty, poor education, low health knowledge, poor infrastructure which encourages and supports the prevalence of infectious diseases.

i believe the answer is a