Answer:
Is a preamble, please can you kindly add the complete question, to know how to answer it in its correct form.
People's life expectancy increasing resulted from of improvements in sanitation, vaccines and antibiotics, housing, and education, causing people to reach a later age than before; Previous eras did not have the equipment to survive infections and diseases.
The South’s economy in the 1850s is best described as "Plantation-based and highly agricultural," since the environment of the South was highly conducive to farming, and slavery was highly depended on up until the Civil War. <span />