A Fire Ant, actually most ants have a pincer.
Fun fact about me: I like to think of unicorns whenever I get nervous, just the aesthetic of them
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.
In "324", the speaker of the poem spends her Sundays at home. She draws a comparison to others, as she states that they mostly spend their Sundays in church. It can also be assumed that the speaker may be outside at her home, as she uses many images of birds, and mentions an orchard.
An author can create an adaption by their own imagination or the real facts of something they are writing about in that genre. Adapting to something would be the finishing touches of something an author is creating.