Final answer:
Mockingjay is set in the fictional country of Panem, a dystopian society in the ruins of North America, and the setting underscores the societal contrasts and tension in the story.
Step-by-step explanation:
Mockingjay, the third book in the Hunger Games series by Suzanne Collins, is set in the fictional country of Panem. Panem is a dystopian society that has risen from the ruins of what was once North America. The setting plays a crucial role in the story, as the oppressive government of Panem, led by the Capitol, exerts control over the residents of the twelve districts through the use of the Hunger Games - a televised event where children from each district are forced to fight to the death.
Over time, Panem becomes a battlefield for a rebellion against this tyranny. The detailed landscapes of Panem, from the impoverished conditions in the districts to the opulence of the Capitol, highlight the stark contrasts in the society and heighten the tension throughout the trilogy.