Idioms presentation

The document discusses the meanings and origins of two idioms: 1) "In black and white" refers to situations that are absolutely right or wrong with no grey area. It originated during the US Civil War when racial groups viewed their own positions as correct. 2) "Gravity of the situation" refers to the seriousness or severe consequences of a situation. The word originated from the Latin words for "weight" and "heavy". Both idioms are demonstrated through example sentences that help illustrate their meanings in different contexts. The document provides concise explanations of two common English phrases.