Answer:
1. Mildred's obsession with the "Parlor Walls": In the novel, Mildred is shown to be completely engrossed in her large television screens which she calls the "parlor walls." She spends most of her time absorbed in the world that they portray and has no interest in reading books or engaging in intellectual discussions. Her obsession with the parlor walls shows that she is superficial and shallow because she is more interested in the superficial world of entertainment than in intellectual pursuits.
2. Mildred's reaction to Montag's emotional outbursts: When Montag shows her the books he has been hiding, Mildred shows no interest in them and is unresponsive to Montag's emotional outbursts. This demonstrates her superficiality as she is unable to understand or sympathize with Montag's emotions, which are profound and heartfelt.
3. Mildred's friends' indifference to the war: When Mildred's friends visit her house, they are completely disconnected from the reality of the world. They show no interest in the news of the ongoing war and instead focus on trivial matters such as the latest fashion trends or gossip about their neighbors. This highlights their shallow and frivolous nature as they are unable to engage with issues of greater importance and gravitate towards superficial matters instead.