Which of the following factors have played an important role in decline in death rate rapidly throughout the world?

Revolution in Medical field

The correct answer is Option 2: Revolution in Medical field

While all the options mentioned can contribute to improvements in healthcare and potentially influence death rates, the revolution in the medical field has played a significant role in rapidly declining death rates throughout the world. Advances in medical technology, treatments, and public health initiatives have been crucial in reducing mortality from various diseases and improving overall health outcomes.