Final answer:
Chief Bromden likely shows concern and offers subtle support to McMurphy when he is depressed, due to their growing friendship and Bromden's evolving perspective on the ward. Bromden's actions are driven by gratitude and loyalty towards McMurphy for reawakening his sense of self.
Step-by-step explanation:
The character Chief Bromden from One Flew Over the Cuckoo's Nest takes action when he notices that McMurphy is depressed. Although the text provided does not directly answer this scenario, we can infer from the novel's narrative that Chief Bromden's response to McMurphy's depression would likely be a combination of concern and a subtle form of support, as he is deeply influenced by McMurphy's rebellious spirit. Chief Bromden is known for his quiet observation, and his actions towards McMurphy would be shaped by their growing friendship and Bromden's evolving view of the ward they are both trapped in.
In the context of the novel, Chief Bromden's lifeline was restored by McMurphy's presence, which gave him the strength to take significant action later in the story. It is this bond and Bromden's reawakening that prompt him to care for McMurphy and try to alleviate his depression, often through forms of nonverbal support or by participating in McMurphy's plans for rebellion against the oppressive hospital regime. The 'why' behind Bromden's actions is deeply rooted in the gratitude and loyalty he feels towards McMurphy for helping him reclaim his sense of self and his voice in a figurative sense.