Final answer:
Ancient Egyptian religion is the religion with preoccupation with the afterlife in the 19th and 20th dynasties.
Step-by-step explanation:
The religion with a preoccupation with the afterlife in the 19th and 20th dynasties is Ancient Egyptian religion.
During the Middle Kingdom (Dynasty 11–13), significant shifts in religious practices and afterlife beliefs took place. Egyptian culture redefined their ideologies of kingship and reflected new perspectives on the afterlife. This religion focused on mummification and believed in the existence of a complex afterlife consisting of judgment, resurrection, and eternal life.