How does language convey the mood of the text?

Language helps set the mood 
Mood is what the reader feels while reading a scene or story. It’s not the reader’s emotions, but the atmosphere (the vibe) of a scene or story. It’s what the reader reads or feels or notices. Not all readers would necessarily report the same mood from a scene, although the writer does hope to achieve a particular feel common to every reader.

Language helps set the time that things are being side so that shows how the characters feel about something or someone

The excerpt reflects collectivism, because it reveals the narrator's deep love for other individuals. hope this ! ^^