Final answer:
The leading cause of death in infants can vary depending on different factors. In low-income countries, pneumonia, diarrhea, congenital anomalies, preterm birth complications, birth asphyxia/trauma, and malaria are common causes. In the United States, sudden infant death syndrome (SIDS) is a leading cause of death in the first year of life.
Step-by-step explanation:
The leading cause of death in infants, according to various sources, can be attributed to different factors. In low-income countries, the most frequent causes of death in children under five years old include pneumonia, diarrhea, congenital anomalies, preterm birth complications, birth asphyxia/trauma, and malaria.
Additionally, sudden infant death syndrome (SIDS) is one of the leading causes of death in the first year of life in the United States, and it remains unexplained. There are various risk factors associated with SIDS, such as premature birth, smoking within the home, and hyperthermia.
Overall, infant mortality is influenced by multiple factors such as poverty, malnutrition, disease, lack of access to quality health care, unsanitary living conditions, and environmental factors like indoor air pollution and poor water and sanitation.