Answer:
Artificial intelligence is the broader concept of machines being able to carry out tasks in a way that we would consider “smart.” Machine learning is a current application of AI based around the idea that we should really just be able to give machines access to data and let them learn for themselves.
There are many factors involved in the improvement in the life expectancy such as sanitation, housing, scientific research to cure many diseases and infections, education etc.
Historically it was the nineteenth and early twentieth century when all these improvements were made due to which the mortality rate decreased intensively in early and middle ages.
Be prepared to spend money and tell lies