Because some people don't have the guts to say they told a lie because they don't want to face consequences.
I believe its c. adjective phrase Because "of a landscape" describes what kind of picture is to be drawn. And Adjectives describe.
The falling action is everything that comes after the part of him crying at the milk bar and feeling guilty. Basically everything after the line, "When the crying spell passed, he wiped his eyes and face with his hankerchief, feeling relieved."