The fact that the top causes of death in the United States are due to chronic illness while people in the developing world are continually affected by the threat of acute illnesses indicates that

illness is impacted by social factors.

Explanation:

Social factors have an important role to play in determining health outcomes for example education level, exposure to violence, difficulties in daily life, local health services, and toxic environment which can lead to premature death. Health equity involves removing barriers to health, such as unequal treatment and poverty, and the effects of those barriers. These barriers involve a lack of quality education, safe working conditions, good housing, reasonable pay, and affordable healthcare and all these facilities differentiate a developing nation from the developed ones.