Question

the main factors contributing to the decline in death rate in20th century were​

Answer 1

Answer:

During the first half of the century, changes in the ability to avoid and withstand infectious diseases were the prime factors in reducing mortality. Infectious diseases were the leading cause of death in 1900, accounting for 32 percent of deaths. Pneumonia and influenza were the biggest killers.

Answer 2

Answer:

The main factors contributing to the decline in death rate in20th century were​ Improvements in public health.

Explanation:

A significant advancement in public health during the 20th century caused a general decline in death rates. Rates of maternal and infant mortality have significantly declined. For every 1,000 births in the early 1900s, 6–9 women died from problems connected to pregnancy, and 100 newborns died before turning one. The infant mortality rate in the United States dropped more than 90% to 7.2 deaths per 1,000 live births in 1999, at the turn of the century. Similar to this, the rate of maternal deaths decreased by approximately 98%, falling to less than 0.1 per 1,000 live births.

Hence , the answer to this question is Improvements in public health.

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