Monologue is spoken by one character, usually to themselves.
Dialogue is spoken by multiple characters
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.
It uses more dynamic words
Seafarer is the main hero in the Anglo-Saxon Ballad. the character has embraced a existence adrift. He begins by introducing the issues over mariners life, like the detachment, the unusual weather and the ferocious sea. not being able to deal with these difficulties he leaves and goes for new adventure. but before being able to finish the ballad instructs his pursuers and his of fleetingness of "natural life and the quality of the Lord's hand".
He is a troubadour, and is being pushed from his kingdom after the death of the Lord. consequence to him not being able to locate another master, the Wanderer travel the Earth feeling isolated and thinking of his previous life he is similar to the seafarer because he "ruminates on the short life of natural life and the energy of destiny".